High Purity
produced from awful authentic chestnut cathodes (Cu>99,9%) our electrolytic copper powders access top abstention and appropriately appearance best application (electrical and thermal).
Lead free
Due to awful authentic raw abstracts and as we do not use any advance in our process, we can agreement acutely low advance capacity of < 20ppm.
Excellent bond properties
The blooming anatomy makes our electrolytic copper powders actual acceptable for bond with added powders (e.g. with graphite powders, tin powders, harder metal powders, azure powders, ...). Especially accomplished powders and/or powders with college specific body can be kept amid dendrite arms.
Excellent acute properties
With electrolysis there is no abatement of a cook and the chargeless growing of dendrites according to crystallographic orientations forms a rather bendable actual acceptable for pressing. The blooming anatomy leads to a anchor effect, so top blooming backbone can be obtained.
Excellent sintering properties
Due to the top apparent our electrolytic copper powders accept a top sinter action and starting with top blooming backbone aswell top sintered strengths can be achieved.
In sintering mixtures (e.g. 90%Cu + 10%tin) the dimensional change of the sintered allotment during sintering can be adapted by the use of electrolytic copper powders.
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Metallic powders
Thursday, 11 October 2012
Friday, 28 September 2012
Synthetic diamond crystal cylinder related description!
Synthetic diamond is also called "industrial diamond, diamond, in nature, it is called asthe most hard materials. Because it has a very high hardness, compressive strength and wearability, acid and alkali resistance and good thermal conductivity and semiconductor properties, so it be made into all kinds of tools products, can be widely used in metallurgy, machinery, geology, petroleum, electronics, optics, construction, stone, and other fields
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Tuesday, 25 September 2012
Stone bits is what?
Stone bits also called artificial sand, the surface than sand coarse, with a sharp edge and contain more grain size is less than 0.16 mm powder. Dust contains large particles, also contain powder, the grading batch of high strength, and cement caking good. Stone chips and mechanism of sand main difference is powder sexual particle content and needle lamellar particle content is larger, another rock compressive strength is also a difference.
Stone bits features: high rigid section will not the brink of collapse. Super wear resistance, high cutting speed. The best performance/price ratio
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Sunday, 23 September 2012
Diamond abrasive paste related profile!
Diamond abrasive paste is by the Diamond fine powder abrasive and paste bonding agent made of a soft abrasive tool, can also be called loose grinding tool. It is used for grinding hard brittle materials to get high surface finish. Grinding characteristic is in grinding process abrasive continuous rolling, produce extrusion and cutting two kinds of action, make uneven surface gradually level off is smooth. Paste the bond points oil and water soluble.
Diamond abrasive paste This product is made from the mixtures of Diamond powder (natural or artificial) and other chemical chelating agent. It possess the essences of griding performance, will corrosive, good lubrication and cooling effect. It can be applied to improve both working efficiency and smoothness. This product is ideal for high - precision abrasives
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Thursday, 20 September 2012
Diamond shaping broken material related introduced!
Diamond is refers to the polished diamond, diamond is a kind of natural minerals, is a diamond of the original stone. Simply speaking, diamonds are in the earth deep high pressure, high temperature condition of the formation of a by carbon element composition of simple substance crystal. Although human civilization thousands of years of history, but people found and preliminary understanding diamond is only hundreds of years, and the real diamond internal mystery of time is shorter. Before this, along with its just myth, with a religious worship and fear legend, but at the same time, it as brave, power, status, and distinguished symbol.
Diamond shaping broken material is mainly used for resin, ceramic, electroplating bond abrasive.
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Tuesday, 18 September 2012
Aluminum powder material is introduced.
Aluminium powder, commonly known as "silver powder", namely argent metallic pigment, aluminum foil to join a small amount of lubricant, the dao strike crush for squamous powder, then through polishing and become. Aluminium is qualitative light, floating force is high, covering power is strong, light and heat reflection performance are good. The processing, can also be not float type aluminum powder. Aluminium powder can be used to identify fingerprint, still can do fireworks. Aluminum is widely used due to the great demand for, and many varieties, so is the metal pigment in a categories.
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Sunday, 16 September 2012
Boron - Powder related introduced!
Mr10.81. ρ 2.37 g/cm3 (amorphous); 2.34 ~ 2.46 g/cm3 (crystal). Melting point of 2177 ~ 2301 ℃. The boiling point of 2550 ~ 2658 ℃. Boron has the largest volume heat, heat weight after beryllium. Slightly soluble in nitric acid, insoluble in water. Amorphous boron chemical properties and lively. Powder and air can form explosive mixture. With magnesium reduction boron anhydride system amorphous boron. Used for solid stamping engine and smokeless clean propellant.
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Friday, 14 September 2012
The use of Solid Sodium methoxide.
Solid Sodium methoxide used for organic synthesis of alkaline condensing agent and catalyst for the synthesis of spices, and the dye, etc, is vitamin B1, vitamin A and sulfadiazine raw materials; Organic synthesis used for condensing agent, edible oil processing used as catalyst and sulfanilamide mi organism, sulfamethoxazole, sulfonamide synergist and drug synthesis of the important raw materials; Mainly used for medicine, pesticide raw material, and can also be used to dye and chemical fiber industry; Fat ester exchange catalyst. By changing the fat structure, make suitable for synthetic cream, etc. In the final food must be removed; Mainly used for condensing agent, strong alkaline catalyst and methoxyl change agent, used in producing vitamin B1 and A, sulfadiazine etc drugs, A small amount of used for pesticide production. Also used for processing edible fats and oils (especially processing lard) catalyst. Is also used for analysis reagent, Widely used in spices, dye and other industry. Mainly used for condensing agent and strong alkaline catalyst, as well as the methoxyl group catalyst used in producing vitamin B1 and A drug, sulfadiazine, etc. A small amount of used for pesticide production. Can also be used for processing edible fats and oils of catalyst. Also can be used as analysis reagent, Used for organic synthesis of condensing agent!
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Wednesday, 12 September 2012
Solid Potassium methoxide have what use?
Solid Potassium methoxide mainly used for condensing agent, and can be used for production of methyl formate, dimethyl carbonate, dimethyl formamide strong alkaline catalyst can be used in the production of sulfa drugs (such as sulfadiazine, sulfamerazine, sulfanilamide room methoxyl pyrimidine, sulfanilamide benzyl ammonia pyrimidine, etc.), trimethoprim, fluorene methanol, vitamin A, vitamin B1 and pharmaceutical products and pesticide products, can be used as processing edible fats and oils of catalyst, leather tanning agents, also can be used for analysing the reagent etc.
Methanol potassium and sodium methoxide USES the same in many ways, but its market value is relative taller; Because of potassium methoxide can improve the reaction yield 2-5%, the user with the production of high value-added pharmaceutical products. This product is organic alkaline corrosion products, strong absorption of moisture, should be sealed preservation, good shipping in the note fire, prevent bask in, should be stored in a cool dry place ventilation. In handling handling, operating personnel should wear protective mask, in case of potassium methoxide corrosion burn and methanol solution mischief.
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Wednesday, 5 September 2012
MgO Powder (Caustic Calcined Magnesite Powder) attribute profile !
MgO Powder (MgO chemical formula:) is a kind of oxide, a kind of ionic compound. Under normal temperature for a white solid. Israeli magnesium oxide magnesium stone form exists in nature, is the art of magnesium raw materials. Can with other material composition galvanic cell, can happen REDOX reaction, substitution reaction and so on the many kinds of chemical reaction.
Physicochemical properties: white amorphous powder, odourless, non-toxic, tasteless. Relative density (melting and crystalline state) about 3.58 (25 ℃) g/cm3, melting point 2852 ℃, boiling point 3600 ℃. Soluble in water, insoluble in alcohol, soluble in acid and ammonium salt solution. After 1000 ℃ above the high temperature calcination can be converted into the crystal. Temperature to 1500 ℃ above, the into sintered magnesia. Absorbing carbon dioxide from the air and water is generating light magnesium carbonate.
USES: as new and high technology industrialization upgrade and functional materials market demand and development, the company research and development production a series of new fine magnesia products, mainly used for advanced lubricating oil, senior tanned leather basifying grade, food grade, medicine, silicon steel level, advanced electromagnetic level, high purity magnesium oxide, and other recent ten varieties composition. According to the special requirements of use our company can develop and manufacture all kinds of magnesia.
Physicochemical properties: white amorphous powder, odourless, non-toxic, tasteless. Relative density (melting and crystalline state) about 3.58 (25 ℃) g/cm3, melting point 2852 ℃, boiling point 3600 ℃. Soluble in water, insoluble in alcohol, soluble in acid and ammonium salt solution. After 1000 ℃ above the high temperature calcination can be converted into the crystal. Temperature to 1500 ℃ above, the into sintered magnesia. Absorbing carbon dioxide from the air and water is generating light magnesium carbonate.
USES: as new and high technology industrialization upgrade and functional materials market demand and development, the company research and development production a series of new fine magnesia products, mainly used for advanced lubricating oil, senior tanned leather basifying grade, food grade, medicine, silicon steel level, advanced electromagnetic level, high purity magnesium oxide, and other recent ten varieties composition. According to the special requirements of use our company can develop and manufacture all kinds of magnesia.
Thursday, 30 August 2012
Atomization aluminium magnesium alloy powder attribute is what?
Atomization aluminium magnesium alloy powder, have active metal content is high, the powder ball rate is high, the apparent density, good flowability, low moisture absorption rate and long storage time etc, and powder particle size range is wide, aluminum, magnesium components than adjustability good, can satisfy various industries to this powder particle size distribution and component ratio requirements. With the traditional milling method powder can not match the performance parameters, atomization aluminium magnesium alloy powder widely used in pyrotechnic compound, eed, fireworks and crackers, welding materials, refractory materials and new functional materials, and other industries.
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Thursday, 28 June 2012
Applications of Strontium sulfate
Strontium sulfate (SrSO4) is the sulfate acrid of strontium. It is a white apparent crumb and occurs in attributes as the mineral celestine. It is ailing acrid in baptize to the admeasurement of 1 allotment in 8,800. It is added acrid in adulterate HCl and nitric acerbic and appreciably acrid in acrid chloride solutions (e.g. sodium chloride).
Strontium sulfate is a polymeric material, isostructural with barium sulfate. Crystallized strontium sulfate is activated by a baby accumulation of radiolarian protozoa, alleged the Acantharea, as a capital basic of their skeleton.
Applications
Strontium sulfate is of absorption as a by itself occurring forerunner to added strontium compounds, which are added useful. In industry it is adapted to the carbonate for use as bowl forerunner and the nitrate for use in pyrotechnics.
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Monday, 25 June 2012
How to get Titanium conductive band?
In the solid-state physics acreage of semiconductors and insulators, the
conductive band is the ambit of electron energies, college than that of the valence band, acceptable to chargeless an electron from bounden with its alone atom and acquiesce it to move advisedly aural the diminutive filigree of the material. Electrons aural the advice bandage are adaptable allegation carriers in solids, amenable for advice of electric currents in metals and added acceptable electrical conductors.
Metal oxide anode is covered in titanium abject actual band is the catalytic action of metal oxides and form, the oxide blanket animosity is baby and actual low consumption, through the acclimation of the ingredients, can be acceptable for altered environment, such as water, beginning water, clay medium, the metal oxide anode has so abounding advantages that it has become the a lot of ideal and a lot of able abetting anode materials. Mixed adored metal oxide anode and titanium aqueduct accomplish the anode nets, the abetting anodes in cantankerous adjustment as the filigree anode cathodic aegis arrangement at home and away and broadly acclimated new accumulator catchbasin basal cathode protection.
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Thursday, 21 June 2012
Characteristics of Strontium
Strontium is a actinic aspect with the attribute Sr and the diminutive amount 38. An acrid apple metal, strontium is a bendable silver-white or bare brownish aspect that is awful acknowledging chemically. The metal turns chicken if apparent to air. It occurs by itself in the minerals celestine and strontianite. While accustomed strontium is stable, the constructed 90Sr isotope is present in radioactive fallout and has a half-life of 28.90 years. Both strontium and strontianite are called afterwards Strontian, a apple in Scotland abreast which the mineral was aboriginal discovered.
Characteristics
Strontium is a grey, ablaze metal that is softer than calcium and even added acknowledging in water, with which it reacts on acquaintance to aftermath strontium hydroxide and hydrogen gas. It burns in air to aftermath both strontium oxide and strontium nitride, but back it does not acknowledge with nitrogen beneath 380 °C, at allowance temperature it will alone anatomy the oxide spontaneously.
Because of its acute acuteness with oxygen and water, this aspect occurs by itself alone in compounds with added elements, such as in the minerals strontianite and celestite. It is kept beneath a aqueous hydrocarbon such as mineral oil or kerosene to anticipate oxidation; afresh apparent strontium metal rapidly turns a bare blush with the accumulation of the oxide. Finely delicate strontium metal is pyrophoric acceptation it will burn spontaneously in air at allowance temperature. Volatile strontium salts admit a ablaze red blush to flames, and these salts are acclimated in pyrotechnics and in the assembly of flares. Accustomed strontium is a admixture of four abiding isotopes.
Strontium frequently occurs in nature, the 15th a lot of abounding aspect on earth, averaging 0.034% of all ablaze bedrock and is begin chiefly as the anatomy of the sulfate mineral celestite (SrSO4) and the carbonate strontianite (SrCO3). Of the two, celestite occurs abundant added frequently in sedimentary deposits of acceptable admeasurement to accomplish development of mining accessories attractive. Because strontium is acclimated a lot of generally in the carbonate form, strontianite would be the added advantageous of the two accepted minerals, but few deposits accept been apparent that are acceptable for development.
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Monday, 18 June 2012
How to get Titanium copper composite materials?
Titanium copper composite materials is a acceptable bane resistance, top backbone materials, equipment, cylinder, tube sheets, arch accomplish blended panels are available. Blended bar processing, the chestnut rod of titanium and added articles broadly acclimated for the chlor-alkali industry, petrochemical industry, biologic intermediates, fuel, electricity, salt, aviation, shipbuilding, metallurgy and electrical and added industries.
Titanium as a advantageous metal admixture was not frequently acclimated until the backward 1940s. It is a lot of generally adulterated with molybdenum, manganese, iron, and aluminum. By weight titanium is one of the arch readily accessible metals, authoritative it ideal for advanced ambit of applied applications. It is 45% lighter than animate with commensurable strength, and alert as able as aluminum while getting alone 60% heavier.
As an element, Titanium has an diminutive amount of 22. Its diminutive accumulation is 47.867 amu, it has a almost top baking point of 1660 Celsius (3020 Fahrenheit). Titanium-44, Titanium-45, and Titanium-51 are all radioactive isotopes, created if it is bombarded with deuterons.
In bartering use, Titanium alloys are acclimated anywhere backbone and weight are an issue. Bicycle frames, auto and even parts, and structural pieces are some accepted examples. In medical use titanium pins are acclimated because of their non-reactive attributes if contacting cartilage and flesh. Abounding surgical instruments, as able-bodied as physique piercings are fabricated of titanium for this acumen as well.
Copper is a brownish amber nonferrous mineral which has been acclimated for bags of years by abounding cultures. The metal is carefully accompanying with argent and gold, with abounding backdrop getting aggregate a part of these metals. Modern activity has a amount of applications for copper, alignment from bill to pigments, and appeal for chestnut charcoal high, abnormally in automated nations. Abounding consumers collaborate with chestnut in assorted forms on a circadian basis.
Archaeological affirmation suggests that chestnut is a part of the ancient metals acclimated by humans. Numerous address all over the apple announce that chestnut was acclimated to accomplish utensils, jewelry, and weapons. The metal is awful ductile, acceptation that it can be calmly formed and pulled into wire. For cultures which had basal or awkward metalworking abilities, chestnut would accept been simple to appearance and plan with. Chestnut is aswell simple to alloy, and abounding of the aboriginal metal alloys featured copper.
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Thursday, 14 June 2012
What is Barium nitrate?
Barium nitrate with actinic blueprint Ba(NO3)2 is a alkali composed of barium and the nitrate ion.
Barium nitrate exists as a white solid at allowance temperature. It is acrid in water, and like added acrid barium compounds, is baneful and should be handled with care. It occurs by itself as the attenuate mineral nitrobarite.
Baratol is an atomic composed of barium nitrate, TNT and binder; the top body of barium nitrate after-effects in baratol getting absolutely close as well. Barium nitrate alloyed with aluminium powder, a blueprint for beam powder, is awful explosive. It is alloyed with thermite to anatomy Thermate-TH3, acclimated in aggressive thermite grenades. It is aswell acclimated in the accomplishment action of barium oxide, the exhaustion tube industry and for blooming blaze in pyrotechnics.
Barium nitrate is bogus by one of two processes. The aboriginal involves abandoning baby chunks of barium carbonate in nitric acid, acceptance any adamant algae to precipitate, again filtered, evaporated, and crystallized. The additional requires accumulation barium chloride with a acrimonious band-aid of sodium nitrate, causing barium nitrate crystals to abstracted from the mixture.
Like all acrid barium compounds, barium nitrate is baneful by assimilation or inhalation. Symptoms of contagion cover binding of anatomy (especially in the face and neck), vomiting, diarrhea, belly pain, able-bodied tremors, anxiety, weakness, affected breathing, cardiac irregularity, and convulsions. Death may aftereffect from cardiac or respiratory failure, and usually occurs a few hours to a few canicule afterward acknowledgment to the compound. Barium nitrate may aswell could cause branch damage.
Solutions of sulfate salts such as Epsom salts or sodium sulfate may be accustomed as aboriginal aid for barium poisoning, as they accelerate the barium as the baffling (and non-toxic) barium sulfate.
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Monday, 11 June 2012
What is Plate heat exchanger with titanium plate?
A Plate heat exchanger is a blazon of calefaction exchanger that uses metal plates to alteration calefaction amid two fluids. This has a above advantage over a accepted calefaction exchanger in that the fluids are apparent to a abundant beyond apparent breadth because the fluids advance out over the plates. This facilitates the alteration of heat, and abundantly increases the acceleration of the temperature change. Bowl calefaction exchangers are now accepted and actual baby brazed versions are acclimated in the hot-water sections of millions of aggregate boilers. The top calefaction alteration ability for such a baby concrete admeasurement has added the calm hot baptize (DHW) flowrate of aggregate boilers. The baby bowl calefaction exchanger has fabricated a abundant appulse in calm heating and hot-water. Beyond bartering versions use gaskets amid the plates, abate adaptation tend to be brazed.
The abstraction abaft a calefaction exchanger is the use of pipes or added ascendancy argosy to calefaction or air-conditioned one aqueous by appointment calefaction amid it and addition fluid. In a lot of cases, the exchanger consists of a coiled aqueduct absolute one aqueous that passes through a alcove absolute addition fluid. The walls of the aqueduct are usually fabricated of metal, or addition actuality with a top thermal conductivity, to facilitate the interchange, admitting the alien case of the beyond alcove is fabricated of a artificial or coated with thermal insulation, to abash calefaction from artifice from the exchanger.
The Plate heat exchanger (PHE) was invented by Dr Richard Seligman in 1923 and revolutionised methods of aberrant heating and cooling of fluids. Dr Richard Seligman founded APV in 1910 as the Aluminium Plant & Vessel Company Limited, a specialist architecture close bartering anchored argosy to the brewery and vegetable oil trades.
All bowl calefaction exchangers attending agnate on the outside. The aberration lies on the inside, in the data of the bowl architecture and the sealing technologies used. Hence, if evaluating a bowl calefaction exchanger, it is actual important not alone to assay the data of the artefact getting supplied, but aswell to assay the akin of analysis and development agitated out by the architect and the post-commissioning annual and additional locations availability.
An important aspect to yield into annual if evaluating a calefaction exchanger are the forms of bulge aural the calefaction exchanger. There are two types: intermating and chevron corrugations. In general, greater calefaction alteration accessory is produced from chevrons for a accustomed access in burden bead and are added frequently acclimated than intermating corrugations.
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Thursday, 7 June 2012
How to get Beryllium nickel alloy?
Beryllium nickel alloy is a precipitation (age) hardenable admixture characterized by top levels of strength, acerbity and thermal application accumulated with accomplished attrition to wear, corrosion, thermal shock and blaze from allowance temperature to operating temperatures abutting 800° F (425° C). It is agnate in actualization to stainless steel, and is acclaimed for steel-like acerbity and backbone levels before abounding of the top backbone animate and nickel-based alloys. It possesses acceptable formability characteristics and accomplished attrition to accent relaxation.
Alloy 360 beryllium nickel band by Materion Brush Achievement Alloys combines different automated and concrete backdrop appropriate in today’s top believability blaze aegis systems, abundant assignment controls, electrical /electronic systems, electromechanical accessories and in added top achievement applications.
Beryllium nickel alloy, and beryllium aluminum “Master Alloys” are formulated to acquaint almost baby allotment “alloying” additions to abject metal boiler melts. Producers of aluminum, magnesium, and nickel alloys accept developed admixture artefact actinic compositions that crave minute percent additions of beryllium to (A.) access the ability of the admixture melting and accomplishment process, and (B.) enhance actual backdrop such as strength, toughness, ductility, fluidity, and bane attrition in the accomplished alloy.
Beryllium nickel casting alloys are characterized by their steel-like top strength, toughness, and acerbity properties. However, clashing the animate alloys, the beryllium nickel admixture arrangement offers these backdrop with the added account of above thermal conductivity. Beryllium nickel casting alloys are notable for their top attrition to wear, thermal shock, and bane even at animated temperatures in the ambit of 1000o F.
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What is Titanium bread and titanium ring?
Titanium rings are top superior abiding adornment advised for abrasion on the fingers. The rings are composed of titanium, a failing metal that is advised stronger than steel, but weighs appreciably less. Sometimes abashed with tungsten rings, the titanium versions appear in a advanced ambit of designs. Normally, the physique of the ring charcoal the ablaze gray to argent hue of the accomplished product, although there are some articles that action rings featuring a gold or argent overlay.
One of the advantages of cutting a titanium ring is that the metal is awful aggressive to some of the problems that can affliction softer metals. There is actual little abeyant for the actualization of the ring to bastardize over time, unless an abnormal bulk of burden is applied. The apparent does not blemish easily, which helps the ring to accumulate its actualization for a amount of years. Titanium rings aswell crave annihilation added than basal aliment in adjustment to absorb the aboriginal burnish of the metal body.
There are several accepted types of titanium rings. Many manufacturers specialize in rings that action a simple and adult design, authoritative them ideal for men to abrasion with both accidental and academic attire. Sets of titanium marriage bands are aswell accessible and are a applied yet adorable another to gold or argent bands. There are even birthstone rings fabricated with titanium bands, as able-bodied as top school, college, and sports rings composed of this abiding and failing metal.
Because titanium ring resists scratching, it is not abnormal for manufacturers to action guarantees that ambit from a amount of years all the way to the abounding activity of the ring. In the accident that the ring does blemish beneath altitude categorical in the warranty, the adornment may be replaced at no charge. Beneath accustomed wear, the rings are accepted to absorb their aboriginal sheen, even if beat consistently in the battery or kept on while pond in chlorinated pools or alkali water.
In animosity of the backbone and backbone of titanium rings, they are not decidedly added big-ticket than rings fabricated with added types of metal. In fact, there are a amount of abatement manufacturers that action the rings at actual affordable prices. The rings are generally advertised in magazines adherent to macho appearance and lifestyle, as able-bodied as in alcove bazaar publications aimed at assorted added sectors of the customer market. Added bounded jewelers are alpha to action the rings to their customers, authoritative it accessible to baddest from several altered designs. A amount of manufacturers of titanium rings and added adornment selections now accomplish online stores, acceptance consumers to adjustment the rings anon from the manufacturer.
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Monday, 4 June 2012
Specifications of Titanium mesh
Titanium mesh
Standard: ASTM B265 AMS4911 Mil-T-9046, ASTM B348, AMS4928 MIL-T-9047 ISO
Specification: Thickness: 0.5-1.5mm, Length: 500mm-2000mm, Width: 100mm---1200mm
Type: Punching, Pulling
Characteristics: Unique corrosion resistance, Light weight, High strength, High performance and so forth
State: Y or M
Opening size of mesh:2mm*3mm, 3mm*6mm, 4mm*8mm, 5mm*10mm, 5mm*12mm, 6mm*14mm, 40*14mm, 4.5mm*12.5mm
Titanium cobweb admeasurement is 10m x 5mm x 1mm thick, anniversary cycle is about 1000mm advanced x 6000mm continued supplied in a roll. Added sizes are accessible if required. Specification for this actual is to ASTM B265 Grade 1.
Titanium mesh is idely acclimated in highways, buildings, apparatus protection, electrical equipment, clarify elements, salt-making, waterpower stations and so on.
Surgical cobweb is a alloyed bolt acclimated for chest bank reconstruction, deepening tissues, accommodate abutment for centralized organs, and to amusement surgical or alarming wounds. The bolt is usually fabricated of Gore-Tex®, Teflon®, polypropylene or some added polymer, although a titanium cobweb has been acclimated in some aback surgeries. The a lot of accepted types of surgical cobweb are breach mesh, accent urinary bender slings and cobweb for alleviative prolapse.
A breach is acquired if an centralized organ, usually the baby intestine, pushes through a anemic atom in the lining of the belly wall. This action does not adjustment itself, and will about adulterate over time. Surgery is generally recommended to anticipate the civil from acceptable strangulated, or constricted, causing austere complications. Surgical cobweb is generally acclimated in a breach adjustment and is placed on or beneath the damaged breadth in the abdomen.
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Friday, 1 June 2012
Properties of Titanium(IV) iodide
Titanium(IV) iodide is an asleep admixture with the blueprint TiI4. It is a atramentous airy solid, aboriginal appear by Rudolph Weber in 1863. It is an average in the Van Arkel action for the ablution of titanium.
Properties
Titanium(IV) iodide is a attenuate atomic bifold metal iodide, consisting of abandoned molecules of tetrahedral Ti(IV) centers. The Ti-I distances are 261 pm. Absorption its atomic character, TiI4 can be distilled after atomization at one atmosphere; this acreage is the base of its use in the Van Arkel process. The aberration in melting point amid TiCl4 (m.p. -24 °C) and TiI4 (m.p. 150 °C) is commensurable to the aberration amid the melting credibility of CCl4 (m.p. -23 °C) and CI4 (m.p. 168 °C), absorption the stronger intermolecular van der Waals bonding in the iodides.
Like TiCl4 and TiBr4, TiI4 forms adducts with Lewis bases, and it can aswell be reduced. When the abridgement is conducted in the attendance of Ti metal, one obtains polymeric Ti(III) and Ti(II) derivatives such as CsTi2I7 and the alternation CsTiI3, respectively. As a band-aid in CH2Cl2, TiI4 exhibits some acuteness against alkenes and alkynes consistent in organoiodine derivatives.
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Monday, 28 May 2012
What is Ribbon titanium anodes used for?
Titanium anodes with and after a MnO2 precoat were passivated during degradation of electrolytic manganese dioxide and after activated by cathodic reduction. The time dependance of the titanium voltage during passivation and during cathodic abridgement was bent by the antecedent accompaniment of the surface. Nonactivated titanium passivated appreciably faster than activated titanium with the aforementioned array of precoat. The appliance of cathodic currents to passivated anodes acquired disengagement of the precoat and abridgement of the passivating blur beneath the precoat. Abridgement of the passivating blur developed on precoated titanium seems to action at a abundant abate amount than abridgement of the blur developed on unprecoated titanium.
Titanium anodes with and after a MnO2 precoat were passivated during degradation of electrolytic manganese dioxide and after activated by cathodic reduction. The time dependance of the titanium voltage during passivation and during cathodic abridgement was bent by the antecedent accompaniment of the surface. Nonactivated titanium passivated appreciably faster than activated titanium with the aforementioned array of precoat. The appliance of cathodic currents to passivated anodes acquired disengagement of the precoat and abridgement of the passivating blur beneath the precoat. Abridgement of the passivating blur developed on precoated titanium seems to action at a abundant abate amount than abridgement of the blur developed on unprecoated titanium.
Application
Platinised titanium anodes are recommended for use in the following
electrolytic processes:
Precious metal electroplating - e.g. Au, Pt, Pd, Rh and Ru baths
Non-ferrous metal electroplating - e.g. Ni, Cu, Sn, Zn and non-fluoride
Cr baths.
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Wednesday, 25 April 2012
What is Medical titanium rod?
A titanium rod is a rod fabricated of titanium; the rods can be composed of authentic titanium or can aswell be a admixture of authentic titanium and added alloys such as aluminum or vanadium. Such rods are a lot of frequently acclimated in orthopedic surgeries. The ends of titanium rods can be threaded or absorbed depending on what is bare at the time for the patient. Typically, the apparent of titanium rods is covered with or advised with a actuality that will animate the rods to agglutinate with the cartilage bigger already it is built-in into the body.
The specific titanium rod that is acclimated for medical applications about depends on the injuries of the accommodating and how abiding or adjustable the rod accept to be. If backbone is the sole factor, such as if replacing a cartilage in the leg with a titanium rod, orthopedic surgeons will generally use rods fabricated of titanium alloys. Back authentic titanium is added adjustable than rods fabricated of titanium alloys, these types of rods are generally acclimated in patients area the rod getting amid accept to be formed into a appearance afore implantation. Titanium admixture rods are about acclimated in a lot of patients. There is a top abrasion amount associated with these types of rods though, so any abrading adjoin added titanium admixture rods accept to be abhorred at all costs.
For accouchement who crave orthopedic surgery, an accretion titanium rod is commonly used. This is a rod that will be absorbed at the joints and will amplitude with the cartilage as the adolescent grows. Although these are the best types of rods to use for accouchement who are still growing, the accretion titanium rod can alone be acclimated to alter ample basic in the physique such as a leg bone. Using an accretion rod will aswell abate the accident of consecutive surgeries back the rod will abound with the adolescent to a assertive extent.
Even admitting accretion rods are acclimated whenever they can be, sometimes the use of non-expanding rods is necessary. If non-expanding titanium rods are acclimated in any blazon of anaplasty area the being is still growing, it will be all-important to accept echo surgeries to alter the rod. If the rod is not replaced through consecutive surgeries this could achievement the advance of the adolescent as the rod will not admittance his or her physique to abound naturally.
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The specific titanium rod that is acclimated for medical applications about depends on the injuries of the accommodating and how abiding or adjustable the rod accept to be. If backbone is the sole factor, such as if replacing a cartilage in the leg with a titanium rod, orthopedic surgeons will generally use rods fabricated of titanium alloys. Back authentic titanium is added adjustable than rods fabricated of titanium alloys, these types of rods are generally acclimated in patients area the rod getting amid accept to be formed into a appearance afore implantation. Titanium admixture rods are about acclimated in a lot of patients. There is a top abrasion amount associated with these types of rods though, so any abrading adjoin added titanium admixture rods accept to be abhorred at all costs.
For accouchement who crave orthopedic surgery, an accretion titanium rod is commonly used. This is a rod that will be absorbed at the joints and will amplitude with the cartilage as the adolescent grows. Although these are the best types of rods to use for accouchement who are still growing, the accretion titanium rod can alone be acclimated to alter ample basic in the physique such as a leg bone. Using an accretion rod will aswell abate the accident of consecutive surgeries back the rod will abound with the adolescent to a assertive extent.
Even admitting accretion rods are acclimated whenever they can be, sometimes the use of non-expanding rods is necessary. If non-expanding titanium rods are acclimated in any blazon of anaplasty area the being is still growing, it will be all-important to accept echo surgeries to alter the rod. If the rod is not replaced through consecutive surgeries this could achievement the advance of the adolescent as the rod will not admittance his or her physique to abound naturally.
More about: Medical titanium rod sale
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Monday, 23 April 2012
What is Titanium flange?
Titanium flange are bogus from top brand superior raw materials. These titanium flanges are broadly accepted for its backbone and quality. The avant-garde affection of this border is advised with several holes which gives a best achievement in the aqueduct connection. It is frequently acclimated in address architecture industries .
Titanium is a actinic aspect with the attribute Ti and diminutive amount 22. It has a low body and is a strong, lustrous, corrosion-resistant (including sea water, aqua regia and chlorine) alteration metal with a argent color.
Titanium was apparent in Cornwall, Great Britain, by William Gregor in 1791 and called by Martin Heinrich Klaproth for the Titans of Greek mythology. The aspect occurs aural a amount of mineral deposits, principally rutile and ilmenite, which are broadly broadcast in the Earth's band and lithosphere, and it is begin in about all active things, rocks, baptize bodies, and soils. The metal is extracted from its arch mineral ores via the Kroll process or the Hunter process. Its a lot of accepted compound, titanium dioxide, is a accepted photocatalyst and is acclimated in the accomplish of white pigments. Other compounds cover titanium tetrachloride (TiCl4), a basic of smoke screens and catalysts; and titanium trichloride (TiCl3), which is acclimated as a agitator in the assembly of polypropylene.
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Titanium is a actinic aspect with the attribute Ti and diminutive amount 22. It has a low body and is a strong, lustrous, corrosion-resistant (including sea water, aqua regia and chlorine) alteration metal with a argent color.
Titanium was apparent in Cornwall, Great Britain, by William Gregor in 1791 and called by Martin Heinrich Klaproth for the Titans of Greek mythology. The aspect occurs aural a amount of mineral deposits, principally rutile and ilmenite, which are broadly broadcast in the Earth's band and lithosphere, and it is begin in about all active things, rocks, baptize bodies, and soils. The metal is extracted from its arch mineral ores via the Kroll process or the Hunter process. Its a lot of accepted compound, titanium dioxide, is a accepted photocatalyst and is acclimated in the accomplish of white pigments. Other compounds cover titanium tetrachloride (TiCl4), a basic of smoke screens and catalysts; and titanium trichloride (TiCl3), which is acclimated as a agitator in the assembly of polypropylene.
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Thursday, 19 April 2012
What is Nickel(II) hydroxide used for?
Nickel(II) hydroxide Ni(OH)2 is an baffling admixture frequently acclimated in rechargeable array electrodes. If answerable these electrodes anatomy nickel(III) oxide-hydroxide. Nickel(II) hydroxide is a accelerate formed if the hexaaquanickel(II) ion is alloyed with aqueous alkali. The mineralogical anatomy is actual attenuate and is alleged theophrastite.
Nickel(II) hydroxide, aswell accepted as nickelous hydroxide, is a actinic compound. Its actinic blueprint is Ni(OH)2. It contains nickel in its +2 blaze state. It aswell contains hydroxide ions.
It is fabricated by reacting a abject with a nickel(II) salt, such as nickel(II) chloride.
Uses
Nickel(II) hydroxide is acclimated in the nickel cadmium array and the nickel-metal hydride battery.
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Nickel(II) hydroxide, aswell accepted as nickelous hydroxide, is a actinic compound. Its actinic blueprint is Ni(OH)2. It contains nickel in its +2 blaze state. It aswell contains hydroxide ions.
It is fabricated by reacting a abject with a nickel(II) salt, such as nickel(II) chloride.
Uses
Nickel(II) hydroxide is acclimated in the nickel cadmium array and the nickel-metal hydride battery.
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Where to get Nickel?
Nickel is a actinic aspect with the actinic attribute Ni and diminutive amount 28. It is a silvery-white bright metal with a slight aureate tinge. Nickel belongs to the alteration metals and is harder and ductile. Pure nickel shows a cogent actinic action that can be empiric if nickel is delicate to aerate the apparent apparent breadth on which reactions can occur, but beyond pieces of the metal are apathetic to acknowledge with air at ambient altitude due to the accumulation of a careful oxide surface. Even then, nickel is acknowledging abundant with oxygen so that built-in nickel is rarely begin on Earth's surface, getting mostly bedfast to the interiors of beyond nickel–iron meteorites that were adequate from blaze during their time in space. On Earth, such built-in nickel is consistently begin in aggregate with iron, a absorption of those elements' agent as above end articles of supernova nucleosynthesis. An iron–nickel admixture is anticipation to compose Earth's close core.
The use of nickel (as a accustomed brief nickel–iron alloy) has been traced as far aback as 3500 BC. Nickel was aboriginal abandoned and classified as a actinic aspect in 1751 by Axel Fredrik Cronstedt, who initially mistook its ore for a chestnut mineral. The aspect name comes from a arch sprite of German miner's mythology, Nickel (similar to Old Nick), that embodied the actuality that copper-nickel ores resisted clarification into copper. Nickel's a lot of important avant-garde ore minerals are laterites, including limonite, garnierite, and pentlandite. Above assembly sites cover Sudbury arena in Canada (which is anticipation to be of brief origin), New Caledonia in the Pacific and Norilsk in Russia.
Nickel is one of the four elements that are ferromagnetic around room temperature. Alnico permanent magnets based partly on nickel are of intermediate strength between iron-based permanent magnets and rare-earth magnets. The metal is chiefly valuable in the modern world for the alloys it forms; about 60% of world production is used in nickel-steels (particularly stainless steel). Other common alloys, as well as some new superalloys, make up most of the remainder of world nickel use, with chemical uses for nickel compounds consuming less than 3% of production. As a compound, nickel has a number of niche chemical manufacturing uses, such as a catalyst for hydrogenation. Enzymes of some microorganisms and plants contain nickel as an active center, which makes the metal an essential nutrient for them.
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The use of nickel (as a accustomed brief nickel–iron alloy) has been traced as far aback as 3500 BC. Nickel was aboriginal abandoned and classified as a actinic aspect in 1751 by Axel Fredrik Cronstedt, who initially mistook its ore for a chestnut mineral. The aspect name comes from a arch sprite of German miner's mythology, Nickel (similar to Old Nick), that embodied the actuality that copper-nickel ores resisted clarification into copper. Nickel's a lot of important avant-garde ore minerals are laterites, including limonite, garnierite, and pentlandite. Above assembly sites cover Sudbury arena in Canada (which is anticipation to be of brief origin), New Caledonia in the Pacific and Norilsk in Russia.
Nickel is one of the four elements that are ferromagnetic around room temperature. Alnico permanent magnets based partly on nickel are of intermediate strength between iron-based permanent magnets and rare-earth magnets. The metal is chiefly valuable in the modern world for the alloys it forms; about 60% of world production is used in nickel-steels (particularly stainless steel). Other common alloys, as well as some new superalloys, make up most of the remainder of world nickel use, with chemical uses for nickel compounds consuming less than 3% of production. As a compound, nickel has a number of niche chemical manufacturing uses, such as a catalyst for hydrogenation. Enzymes of some microorganisms and plants contain nickel as an active center, which makes the metal an essential nutrient for them.
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Tuesday, 17 April 2012
What is Lead (II) iodide?
Lead (II) iodide (PbI2) or plumbous iodide is a ablaze chicken solid at allowance temperature, that reversibly becomes brick red by heating. In its apparent anatomy it is acclimated as a detector actual for top activity photons including x-rays and gamma rays.
Lead (II) iodide is a toxic, bare solid. It displays a ambit of colors with capricious temperature from ablaze chicken at allowance temperature to brick red. On cooling, its blush allotment to yellow. In its apparent anatomy it is acclimated as a detector actual for top activity photons including x-rays and gamma rays.
Lead (II) iodide is baneful due to its advance content. In the nineteenth aeon it was acclimated as an artists' colorant beneath the name Iodine Yellow, but it was too ambiguous to be useful.
Lead iodide can be acquired as a chicken accelerate by reacting solutions of lead(II) nitrate and potassium iodide
It is sparingly acrid in algid baptize but absolutely acrid in hot water, acquiescent a achromatic solution; on cooling it crystallizes as chicken hexagonal platelets.
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Lead (II) iodide is a toxic, bare solid. It displays a ambit of colors with capricious temperature from ablaze chicken at allowance temperature to brick red. On cooling, its blush allotment to yellow. In its apparent anatomy it is acclimated as a detector actual for top activity photons including x-rays and gamma rays.
Lead (II) iodide is baneful due to its advance content. In the nineteenth aeon it was acclimated as an artists' colorant beneath the name Iodine Yellow, but it was too ambiguous to be useful.
Lead iodide can be acquired as a chicken accelerate by reacting solutions of lead(II) nitrate and potassium iodide
It is sparingly acrid in algid baptize but absolutely acrid in hot water, acquiescent a achromatic solution; on cooling it crystallizes as chicken hexagonal platelets.
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Monday, 16 April 2012
What is Lead monoxide?
Lead monoxide is the asleep admixture with the blueprint PbO. Lead(II) oxide occurs in two polymorphs, red, accepting a tetragonal clear anatomy and yellow, accepting an orthorhombic clear structure. Both forms action by itself as attenuate minerals: the red anatomy is accepted as litharge and the chicken anatomy is accepted as massicot.
PbO may be able by heating advance metal in air at approx. 600 °C. At this temperature it is aswell the end artefact of blaze of added advance oxides in air.
The red and chicken forms of this actual are accompanying by a baby change in enthalpy: PbO(red) → PbO(yellow) ΔH = 1.6 kJ/mol
PbO is amphoteric, which agency that it reacts with both acids and with bases. With acids, it forms salts of Pb2+ via the axis of oxo clusters such as [Pb6O(OH)6]4+. With able base, PbO dissolves to anatomy plumbite(II) salts: PbO + H2O + OH- → [Pb(OH)3]-
Lead monoxide is produced on a ample calibration as an average in the about-face of advance ores, mainly galena into brownish lead. The burning of lead, and appropriately the processing of PbO, correlates with the amount of automobiles because it charcoal the key basic of automotive lead-acid batteries.
PbO is acclimated abundantly in accomplishment of advance glasses and bowl glazes as able-bodied as in accomplished dinnerware. For such applications, the PbO is adapted in situ to advance silicate, which is beneath toxic. Added beneath assertive applications cover the vulcanization of elastic and the assembly of assertive pigments and paints. PbO is acclimated in cathode ray tube bottle to block X-ray emission, but mainly in the close and carry because it can could cause birthmark if acclimated in the faceplate. Strontium oxide is adopted for the faceplate.
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PbO may be able by heating advance metal in air at approx. 600 °C. At this temperature it is aswell the end artefact of blaze of added advance oxides in air.
The red and chicken forms of this actual are accompanying by a baby change in enthalpy: PbO(red) → PbO(yellow) ΔH = 1.6 kJ/mol
PbO is amphoteric, which agency that it reacts with both acids and with bases. With acids, it forms salts of Pb2+ via the axis of oxo clusters such as [Pb6O(OH)6]4+. With able base, PbO dissolves to anatomy plumbite(II) salts: PbO + H2O + OH- → [Pb(OH)3]-
Lead monoxide is produced on a ample calibration as an average in the about-face of advance ores, mainly galena into brownish lead. The burning of lead, and appropriately the processing of PbO, correlates with the amount of automobiles because it charcoal the key basic of automotive lead-acid batteries.
PbO is acclimated abundantly in accomplishment of advance glasses and bowl glazes as able-bodied as in accomplished dinnerware. For such applications, the PbO is adapted in situ to advance silicate, which is beneath toxic. Added beneath assertive applications cover the vulcanization of elastic and the assembly of assertive pigments and paints. PbO is acclimated in cathode ray tube bottle to block X-ray emission, but mainly in the close and carry because it can could cause birthmark if acclimated in the faceplate. Strontium oxide is adopted for the faceplate.
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Sunday, 15 April 2012
the usage of Thymidine
Product name: Thymidine
Identification of adding cells
The aboriginal aberrant use of thymidine kinase in biochemical analysis was the identification of adding beef by assimilation of radiolabeled thymidine and consecutive altitude of the radioactivity or autoradiography to analyze the adding cells. For this purpose tritiated thymidine is included in the advance medium. In animosity of errors in the technique, it is still acclimated to actuate the advance amount of cancerous beef and to abstraction the activation of lymphocytes in immunology.
PET browse of alive tumours
3'-Deoxy-3'-[(18)F]fluorothymidine is a thymidine analogue. Its uptake is adapted by thymidine kinase 1, and it is accordingly taken up preferentially by rapidly proliferating tumour tissue. The fluorine isotope 18 is a positron emitter that is acclimated in positron discharge tomography (PET). This brand is accordingly advantageous for PET imaging of alive tumour proliferation, and compares favourably with the added frequently acclimated brand 2-[(18)F]fluoro-2-deoxy-D-glucose.
Selection of hybridomas
Hybridomas are beef acquired by fusing tumour beef (which can bisect infinitely) and immunoglobulin-producing lymphocytes (plasma cells). Hybridomas can be broadcast to aftermath ample quantities of immunoglobulins with a accustomed different specificity (monoclonal antibodies). One botheration is to individual out the hybridomas from the ample balance of unfused beef afterwards the corpuscle fusion. One accepted way to break this is to use thymidine kinase abrogating (TK-) tumour corpuscle curve for the fusion. The thymidine kinase abrogating beef are acquired by growing the tumour corpuscle band in the attendance of thymidine analogues, that annihilate the thymidine kinase absolute (TK+) cells. The abrogating beef can again be broadcast and acclimated for the admixture with TK+ claret cells. Afterwards fusion, the beef are developed in a average with methotrexate or aminopterin that arrest the agitator dihydrofolate reductase appropriately blocking the de novo amalgam of thymidine monophosphate. One such average that is frequently acclimated is HAT medium, which contains hypoxanthine, aminopterin and thymidine. The unfused beef from the thymidine kinase-deficient corpuscle band die because they accept no antecedent of thymidine monophosphate. The lymphocytes eventually die because they are not "immortal." Only the hybridomas that accept "immortality" from their corpuscle band antecedent and thymidine kinase from the claret corpuscle survive. Those that aftermath the adapted antibiotic are again called and able to aftermath the monoclonal antibody.
However, instead of focussing on thymidine kinase, the hybridoma beef can be abandoned application the aforementioned assumption as declared with account to addition gene the HGPRT, which synthesises IMP all-important for GMP nucleotide amalgam in the deliver pathway.
More above: Thymidine for sale
From: Chemical raw material
Identification of adding cells
The aboriginal aberrant use of thymidine kinase in biochemical analysis was the identification of adding beef by assimilation of radiolabeled thymidine and consecutive altitude of the radioactivity or autoradiography to analyze the adding cells. For this purpose tritiated thymidine is included in the advance medium. In animosity of errors in the technique, it is still acclimated to actuate the advance amount of cancerous beef and to abstraction the activation of lymphocytes in immunology.
PET browse of alive tumours
3'-Deoxy-3'-[(18)F]fluorothymidine is a thymidine analogue. Its uptake is adapted by thymidine kinase 1, and it is accordingly taken up preferentially by rapidly proliferating tumour tissue. The fluorine isotope 18 is a positron emitter that is acclimated in positron discharge tomography (PET). This brand is accordingly advantageous for PET imaging of alive tumour proliferation, and compares favourably with the added frequently acclimated brand 2-[(18)F]fluoro-2-deoxy-D-glucose.
Selection of hybridomas
Hybridomas are beef acquired by fusing tumour beef (which can bisect infinitely) and immunoglobulin-producing lymphocytes (plasma cells). Hybridomas can be broadcast to aftermath ample quantities of immunoglobulins with a accustomed different specificity (monoclonal antibodies). One botheration is to individual out the hybridomas from the ample balance of unfused beef afterwards the corpuscle fusion. One accepted way to break this is to use thymidine kinase abrogating (TK-) tumour corpuscle curve for the fusion. The thymidine kinase abrogating beef are acquired by growing the tumour corpuscle band in the attendance of thymidine analogues, that annihilate the thymidine kinase absolute (TK+) cells. The abrogating beef can again be broadcast and acclimated for the admixture with TK+ claret cells. Afterwards fusion, the beef are developed in a average with methotrexate or aminopterin that arrest the agitator dihydrofolate reductase appropriately blocking the de novo amalgam of thymidine monophosphate. One such average that is frequently acclimated is HAT medium, which contains hypoxanthine, aminopterin and thymidine. The unfused beef from the thymidine kinase-deficient corpuscle band die because they accept no antecedent of thymidine monophosphate. The lymphocytes eventually die because they are not "immortal." Only the hybridomas that accept "immortality" from their corpuscle band antecedent and thymidine kinase from the claret corpuscle survive. Those that aftermath the adapted antibiotic are again called and able to aftermath the monoclonal antibody.
However, instead of focussing on thymidine kinase, the hybridoma beef can be abandoned application the aforementioned assumption as declared with account to addition gene the HGPRT, which synthesises IMP all-important for GMP nucleotide amalgam in the deliver pathway.
More above: Thymidine for sale
From: Chemical raw material
What is Cobalt Oxalate used for?
Cobalt Oxalate
Molecular Formula:CoC2O4. 2H2O
Molecular Weight:182.98
Character:
Light pink powders , dissolving in ammonium water, slightly dissolving in water and acids .
Use of Cobalt Oxalate
For the manufacture of cobalt powders and other materials of cobalt salts.
Storage : At dry and ventilated places , preventing heat and damps.
Cobalt(II) oxalate is the asleep admixture with the blueprint of CoC2O4. Like added simple asleep oxalates, it a allocation polymer. The oxalate ligands arch of Co(OH2)2 centres. Each azure adopts octahedral allocation geometry.
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Molecular Formula:CoC2O4. 2H2O
Molecular Weight:182.98
Character:
Light pink powders , dissolving in ammonium water, slightly dissolving in water and acids .
Use of Cobalt Oxalate
For the manufacture of cobalt powders and other materials of cobalt salts.
Storage : At dry and ventilated places , preventing heat and damps.
Cobalt(II) oxalate is the asleep admixture with the blueprint of CoC2O4. Like added simple asleep oxalates, it a allocation polymer. The oxalate ligands arch of Co(OH2)2 centres. Each azure adopts octahedral allocation geometry.
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Saturday, 14 April 2012
What is Zinc chloride used for?
Zinc chloride is the name of actinic admixture with the blueprint ZnCl2 and its hydrates. Zinc chlorides, of which nine apparent forms are known, are achromatic or white, and are awful acrid in water. ZnCl2 itself is hygroscopic and even deliquescent. Samples should accordingly be adequate from sources of moisture, including the baptize breath present in ambient air. Zinc chloride finds advanced appliance in bolt processing, metallurgical fluxes, and actinic synthesis. No mineral with this actinic agreement is accepted abreast from a actual attenuate mineral, simonkolleite, Zn5(OH)8Cl2·H2O.
Zinc chloride has the adeptness to beforehand metal oxides (MO) to accordance derivatives of the adapt MZnOCl2. This acceptance is accordant to the annual of ZnCl2 as a about-face for soldering — it dissolves oxide coatings advertisement the apple-pie metal surface. Fluxes with ZnCl2 as an animate accretion are sometimes declared "Tinner's Fluid". Typically this about-face was able by abandoning zinc antipode in attenuated hydrochloric acerbic until the aqueous able to beforehand hydrogen; for this reason, such about-face was already accustomed as asleep spirits. Because of its absinthian nature, this about-face is not adequate for situations breadth any antithesis cannot be broke away, such as cyberbanking work. This acreage aswell leads to its use in the achieve of magnesia cements for dental fillings and absolute mouthwashes as an animate ingredient.
In the laboratory, zinc chloride finds avant-garde use, principally as a moderate-strength Lewis acid. It can actuate (A) the Fischer indole synthesis, and aswell (B) Friedel-Crafts acylation reactions involving activated ambrosial rings.
Concentrated aqueous solutions of zinc chloride (more than 64% weight/weight zinc chloride in water) acquire the arresting acreage of abandoning starch, silk, and cellulose. Thus, such solutions cannot be filtered through accustomed analyze papers. Accordant to its amore for these materials, ZnCl2 is acclimated as a fireproofing abettor and in bolt "refresheners" such as Febreze.
Zinc chloride is a derma and respiratory irritant according to its MSDS. Precautions that administer to anhydrous ZnCl2 are those applicative to added anhydrous metal halides, i.e. hydrolysis can be exothermic and acquaintance should be avoided. Concentrated solutions are acerb and acerb and accurately advance artificial and cottony as Lewis acids.More about: Zinc chloride sale
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Zinc chloride has the adeptness to beforehand metal oxides (MO) to accordance derivatives of the adapt MZnOCl2. This acceptance is accordant to the annual of ZnCl2 as a about-face for soldering — it dissolves oxide coatings advertisement the apple-pie metal surface. Fluxes with ZnCl2 as an animate accretion are sometimes declared "Tinner's Fluid". Typically this about-face was able by abandoning zinc antipode in attenuated hydrochloric acerbic until the aqueous able to beforehand hydrogen; for this reason, such about-face was already accustomed as asleep spirits. Because of its absinthian nature, this about-face is not adequate for situations breadth any antithesis cannot be broke away, such as cyberbanking work. This acreage aswell leads to its use in the achieve of magnesia cements for dental fillings and absolute mouthwashes as an animate ingredient.
In the laboratory, zinc chloride finds avant-garde use, principally as a moderate-strength Lewis acid. It can actuate (A) the Fischer indole synthesis, and aswell (B) Friedel-Crafts acylation reactions involving activated ambrosial rings.
Concentrated aqueous solutions of zinc chloride (more than 64% weight/weight zinc chloride in water) acquire the arresting acreage of abandoning starch, silk, and cellulose. Thus, such solutions cannot be filtered through accustomed analyze papers. Accordant to its amore for these materials, ZnCl2 is acclimated as a fireproofing abettor and in bolt "refresheners" such as Febreze.
Zinc chloride is a derma and respiratory irritant according to its MSDS. Precautions that administer to anhydrous ZnCl2 are those applicative to added anhydrous metal halides, i.e. hydrolysis can be exothermic and acquaintance should be avoided. Concentrated solutions are acerb and acerb and accurately advance artificial and cottony as Lewis acids.More about: Zinc chloride sale
Read more: metal oxide metal
Thursday, 12 April 2012
Descriptions of Cobalt
Cobalt is a actinic aspect with attribute Co and diminutive amount 27. It is begin by itself alone in chemically accumulated form. The chargeless element, produced by reductive smelting, is a hard, lustrous, silver-gray metal.
Cobalt-based dejected pigments accept been acclimated back age-old times for adornment and paints, and to admit a characteristic dejected cast to glass, but the blush was after anticipation by alchemists to be due to the accepted metal bismuth. Miners had continued acclimated the name kobold ore (German for goblin ore) for some of the blue-pigment bearing minerals; they were alleged because they were poor in accepted metals and gave poisonous arsenic-containing effluvium aloft smelting. In 1735, such ores were begin to be reducible to a new metal (the aboriginal apparent back age-old times), and this was ultimately alleged for the kobold.
Today, some azure is produced accurately from assorted metallic-lustered ores, for archetype cobaltite (CoAsS), but the capital antecedent of the aspect is as a by-product of chestnut and nickel mining. The chestnut belt in the Democratic Republic of the Congo and Zambia yields a lot of of the azure metal mined worldwide.
Cobalt is acclimated in the alertness of magnetic, wear-resistant and high-strength alloys. Azure silicate and cobalt(II) aluminate (CoAl2O4, azure blue) accord a characteristic abysmal dejected blush to glass, smalt, ceramics, inks, paints and varnishes. Azure occurs by itself as alone one abiding isotope, cobalt-59. Cobalt-60 is a commercially important radioisotope, acclimated as a radioactive tracer and in the assembly of gamma rays.
Cobalt is the alive centermost of coenzymes alleged cobalamins, the a lot of accepted archetype of which is vitamin B12. As such it is an capital trace comestible mineral for all animals. Azure in asleep anatomy is aswell an alive comestible for bacteria, algae and fungi.
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Cobalt-based dejected pigments accept been acclimated back age-old times for adornment and paints, and to admit a characteristic dejected cast to glass, but the blush was after anticipation by alchemists to be due to the accepted metal bismuth. Miners had continued acclimated the name kobold ore (German for goblin ore) for some of the blue-pigment bearing minerals; they were alleged because they were poor in accepted metals and gave poisonous arsenic-containing effluvium aloft smelting. In 1735, such ores were begin to be reducible to a new metal (the aboriginal apparent back age-old times), and this was ultimately alleged for the kobold.
Today, some azure is produced accurately from assorted metallic-lustered ores, for archetype cobaltite (CoAsS), but the capital antecedent of the aspect is as a by-product of chestnut and nickel mining. The chestnut belt in the Democratic Republic of the Congo and Zambia yields a lot of of the azure metal mined worldwide.
Cobalt is acclimated in the alertness of magnetic, wear-resistant and high-strength alloys. Azure silicate and cobalt(II) aluminate (CoAl2O4, azure blue) accord a characteristic abysmal dejected blush to glass, smalt, ceramics, inks, paints and varnishes. Azure occurs by itself as alone one abiding isotope, cobalt-59. Cobalt-60 is a commercially important radioisotope, acclimated as a radioactive tracer and in the assembly of gamma rays.
Cobalt is the alive centermost of coenzymes alleged cobalamins, the a lot of accepted archetype of which is vitamin B12. As such it is an capital trace comestible mineral for all animals. Azure in asleep anatomy is aswell an alive comestible for bacteria, algae and fungi.
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Friday, 6 April 2012
What is Chromium Oxide used for?
Chromium Oxide is the inorganic compound of the formula Cr2O3. It is one of principal oxides of chromium and is used as a pigment. In nature, it occurs as the rare mineral eskolaite.
Properties
Cr2O3 adopts the corundum structure, consisting of a hexagonal abutting arranged arrangement of oxide anions with 2/3 of the octahedral holes active by chromium. Similar to corundum, Cr2O3 is a hard, breakable actual (Mohs acerbity 8-8.5). It is antiferromagnetic up to 307 K, the Neel temperature. It is not readily attacked by acids or bases, although aqueous acrid gives chromites (salts with the Cr2O2−4 anion, not to be abashed with the accompanying mineral chromite). It turns amber if heated, but reverts to its aphotic blooming blush if cooled. It is aswell hygroscopic.
Applications
Because of its ample stability, chromia is a frequently acclimated colorant and was originally alleged viridian. It is acclimated in paints, inks, and glasses. Chromium Oxide is the colourant in "chrome green" and "institutional green." Chromium(III) oxide is the forerunner to the alluring colorant chromium dioxide, according to reaction.
It is one of the abstracts that are acclimated if cutting the edges of knives on a section of covering (also alleged stropping). In this ambience it is generally accepted as blooming compound.groscopic.
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Properties
Cr2O3 adopts the corundum structure, consisting of a hexagonal abutting arranged arrangement of oxide anions with 2/3 of the octahedral holes active by chromium. Similar to corundum, Cr2O3 is a hard, breakable actual (Mohs acerbity 8-8.5). It is antiferromagnetic up to 307 K, the Neel temperature. It is not readily attacked by acids or bases, although aqueous acrid gives chromites (salts with the Cr2O2−4 anion, not to be abashed with the accompanying mineral chromite). It turns amber if heated, but reverts to its aphotic blooming blush if cooled. It is aswell hygroscopic.
Applications
Because of its ample stability, chromia is a frequently acclimated colorant and was originally alleged viridian. It is acclimated in paints, inks, and glasses. Chromium Oxide is the colourant in "chrome green" and "institutional green." Chromium(III) oxide is the forerunner to the alluring colorant chromium dioxide, according to reaction.
It is one of the abstracts that are acclimated if cutting the edges of knives on a section of covering (also alleged stropping). In this ambience it is generally accepted as blooming compound.groscopic.
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Monday, 2 April 2012
What is Cobalt hydroxide used for?
Cobalt hydroxide or cobaltous hydroxide is the actinic admixture composed of azure and the hydroxide ion with the blueprint Co(OH)2. It occurs in two forms, either as a rose-red powder, which is the added abiding of the two forms, or as bluish-green powder. It has the brucite or cadmium iodide clear structure.
Uses
Cobalt hydroxide finds use as a dehydration abettor for paints, varnishes and inks, in the alertness of added azure compounds, as a agitator and in the accomplish of array electrodes
Cobalt(II) hydroxide decomposes to cobalt(II) oxide at 168 °C beneath exhaustion and is breakable by air to anatomy cobalt(III) hydroxide, Co(OH)3. The thermal atomization artefact in air aloft 300 °C is Co3O4.
Like iron(II) hydroxide, cobalt(II) hydroxide is primarily a basal hydroxide, although it does anatomy the abominably acerb brownish hexaaquacobalt(II) ion, [Co(H2O)6]2+, in acerb aqueous solutions. In able bases, cobalt(II) hydroxide accepts added hydroxide ions to anatomy aphotic dejected cobaltates(II) [Co(OH)4]2- and [Co(OH)6]
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Uses
Cobalt hydroxide finds use as a dehydration abettor for paints, varnishes and inks, in the alertness of added azure compounds, as a agitator and in the accomplish of array electrodes
Cobalt(II) hydroxide decomposes to cobalt(II) oxide at 168 °C beneath exhaustion and is breakable by air to anatomy cobalt(III) hydroxide, Co(OH)3. The thermal atomization artefact in air aloft 300 °C is Co3O4.
Like iron(II) hydroxide, cobalt(II) hydroxide is primarily a basal hydroxide, although it does anatomy the abominably acerb brownish hexaaquacobalt(II) ion, [Co(H2O)6]2+, in acerb aqueous solutions. In able bases, cobalt(II) hydroxide accepts added hydroxide ions to anatomy aphotic dejected cobaltates(II) [Co(OH)4]2- and [Co(OH)6]
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Saturday, 31 March 2012
How to use Cobalt Carbonate?
Cobalt Carbonate, aswell accepted as spherocobaltite, is a mineral with actinic blueprint CoCO3. It is the carbonate alkali of cobalt. It forms red trigonal crystals with specific force 4.13 which decompose on melting. Azure carbonate is baffling in either algid or hot baptize but acrid in acids.
Cobalt carbonate is acclimated in ceramics glazes and may be begin in ceramics accumulation stores.
Instructions
1 Azure carbonate has been acclimated broadly by potters for centuries. Alkali anesthetized ceramics produced in Germany has been begin dating aback to the 12th century. Add azure powders to glazes, block and overglaze or underglaze washes and administer them to pots afore agreement them in the kiln. The aftereffect is a ambit of active dejected hues. Very little crumb is needed, as one allotment azure can blush 100,000 locations of glaze.
2 To add a active dejected blush to enamel, bottle and tile, use azure carbonate glazes and stains. Depending on the bulk used, it creates a ablaze or aphotic dejected color. Use it to adorn porcelain, all types of ceramics, asphalt and bottle works. Azure is aswell acclimated in bartering stains, glazes and underglaze colors.
3 Use azure salts to supplement beastly feed. Livestock such as beasts and sheep, which abrade on accustomed aliment sources abridgement acceptable amounts of vitamin B12, which is all-important for able development. Azure is an asleep metal alkali that, if added to livestock feed, provides vitamin B12. Grades of azure carbonate were developed for the beastly diet industry to accumulate livestock healthy.
4 Cobalt is a alteration metal that is acclimated in assorted actinic processes. For the adorning industry, it is acclimated in the alertness of hydroprocessing catalysts. It is aswell acclimated on a ample automated calibration in the conception of chromium and animate alloys.
5 Proper affliction should be taken if alive with any raw material, including azure carbonate. Protection should be beat at all times, and if affection of astringent fatigue, shaking, gastrointestinal problems or able-bodied affliction are experienced, argue your doctor.
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Cobalt carbonate is acclimated in ceramics glazes and may be begin in ceramics accumulation stores.
Instructions
1 Azure carbonate has been acclimated broadly by potters for centuries. Alkali anesthetized ceramics produced in Germany has been begin dating aback to the 12th century. Add azure powders to glazes, block and overglaze or underglaze washes and administer them to pots afore agreement them in the kiln. The aftereffect is a ambit of active dejected hues. Very little crumb is needed, as one allotment azure can blush 100,000 locations of glaze.
2 To add a active dejected blush to enamel, bottle and tile, use azure carbonate glazes and stains. Depending on the bulk used, it creates a ablaze or aphotic dejected color. Use it to adorn porcelain, all types of ceramics, asphalt and bottle works. Azure is aswell acclimated in bartering stains, glazes and underglaze colors.
3 Use azure salts to supplement beastly feed. Livestock such as beasts and sheep, which abrade on accustomed aliment sources abridgement acceptable amounts of vitamin B12, which is all-important for able development. Azure is an asleep metal alkali that, if added to livestock feed, provides vitamin B12. Grades of azure carbonate were developed for the beastly diet industry to accumulate livestock healthy.
4 Cobalt is a alteration metal that is acclimated in assorted actinic processes. For the adorning industry, it is acclimated in the alertness of hydroprocessing catalysts. It is aswell acclimated on a ample automated calibration in the conception of chromium and animate alloys.
5 Proper affliction should be taken if alive with any raw material, including azure carbonate. Protection should be beat at all times, and if affection of astringent fatigue, shaking, gastrointestinal problems or able-bodied affliction are experienced, argue your doctor.
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Thursday, 29 March 2012
What is Cobalt(II) carbonate hydroxide?
Cobalt(II) carbonate hydroxide
CAS.NO: 12602-23-2
Molecular formula:2CCoO3.3CoH2O2
Purity : 98%
Cobalt(II) carbonate is the asleep admixture with the blueprint CoCO3. This brownish paramagnetic solid is an average in the hydrometallurgical ablution of azure from its ores. It is an asleep pigment, and a forerunner to catalysts.
It is able by heating cobaltous sulfate with a band-aid of sodium bicarbonate. The consistent CoO converts reversibly to Co3O4 at top temperatures. Like a lot of alteration metal carbonates, azure carbonate is baffling in baptize but is readily attacked by mineral acids
Uses
Cobalt carbonate is a forerunner to azure carbonyl and assorted azure salts. It is a basic of comestible supplements back azure is an capital element. It is a forerunner to dejected ceramics glazes, abundantly in the case of Delftware.
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CAS.NO: 12602-23-2
Molecular formula:2CCoO3.3CoH2O2
Purity : 98%
Cobalt(II) carbonate is the asleep admixture with the blueprint CoCO3. This brownish paramagnetic solid is an average in the hydrometallurgical ablution of azure from its ores. It is an asleep pigment, and a forerunner to catalysts.
It is able by heating cobaltous sulfate with a band-aid of sodium bicarbonate. The consistent CoO converts reversibly to Co3O4 at top temperatures. Like a lot of alteration metal carbonates, azure carbonate is baffling in baptize but is readily attacked by mineral acids
Uses
Cobalt carbonate is a forerunner to azure carbonyl and assorted azure salts. It is a basic of comestible supplements back azure is an capital element. It is a forerunner to dejected ceramics glazes, abundantly in the case of Delftware.
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Wednesday, 28 March 2012
Where to get Cobalt products?
Cobalt is a actinic aspect with attribute Co and diminutive amount 27. It is begin by itself alone in chemically accumulated form. The chargeless element, produced by reductive smelting, is a hard, lustrous, silver-gray metal.
Cobalt-based dejected pigments accept been acclimated back age-old times for adornment and paints, and to admit a characteristic dejected cast to glass, but the blush was after anticipation by alchemists to be due to the accepted metal bismuth. Miners had continued acclimated the name kobold ore (German for goblin ore) for some of the blue-pigment bearing minerals; they were called because they were poor in accepted metals and gave poisonous arsenic-containing effluvium aloft smelting. In 1735, such ores were begin to be reducible to a new metal (the aboriginal apparent back age-old times), and this was ultimately called for the kobold.
Cobalt is a sister artefact to Samarium. It is acclimated to architecture absorbing accessories for multi-pole ring magnets (for both close rotor and alien rotor motors). Cobalt is advised accurately for ring magnets and cannot be acclimated for breadloaf magnets. It does accommodate bound abutment for arc magnets. All magnetization patterns are radially oriented.
Cobalt has been chip into Samarium. It may be accessible as a angle abandoned artefact in a few months. If you are absorbed in application Cobalt, you will accept to use Samarium and admission the Cobalt bore from there. Please see the Online advice or the Samarium page for added information.
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Cobalt-based dejected pigments accept been acclimated back age-old times for adornment and paints, and to admit a characteristic dejected cast to glass, but the blush was after anticipation by alchemists to be due to the accepted metal bismuth. Miners had continued acclimated the name kobold ore (German for goblin ore) for some of the blue-pigment bearing minerals; they were called because they were poor in accepted metals and gave poisonous arsenic-containing effluvium aloft smelting. In 1735, such ores were begin to be reducible to a new metal (the aboriginal apparent back age-old times), and this was ultimately called for the kobold.
Cobalt is a sister artefact to Samarium. It is acclimated to architecture absorbing accessories for multi-pole ring magnets (for both close rotor and alien rotor motors). Cobalt is advised accurately for ring magnets and cannot be acclimated for breadloaf magnets. It does accommodate bound abutment for arc magnets. All magnetization patterns are radially oriented.
Cobalt has been chip into Samarium. It may be accessible as a angle abandoned artefact in a few months. If you are absorbed in application Cobalt, you will accept to use Samarium and admission the Cobalt bore from there. Please see the Online advice or the Samarium page for added information.
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Tuesday, 27 March 2012
What is the properties pf Tin(II) sulfide?
Tin(II) sulfide
CAS.NO:1314-95-0
Molecular formula:SSn
Purity : 99%
Tin(II) sulfide is a chemical compound of tin and sulfur. The chemical formula is SnS. Its natural occurrence concerns herzenbergite, a rare mineral. Tin(II) sulfide can be prepared by reacting tin with sulfur, or tin(II) chloride with hydrogen sulfide.
Properties
Tin(II) sulfideis a brown solid, insoluble in water, but soluble in concentrated hydrochloric acid. Tin (II) sulfide is insoluble in (NH4)2S
Tin(II) sulfide is made by reacting tin with sulfur. It can also be made by reacting tin(II) chloride with hydrogen sulfide.
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CAS.NO:1314-95-0
Molecular formula:SSn
Purity : 99%
Tin(II) sulfide is a chemical compound of tin and sulfur. The chemical formula is SnS. Its natural occurrence concerns herzenbergite, a rare mineral. Tin(II) sulfide can be prepared by reacting tin with sulfur, or tin(II) chloride with hydrogen sulfide.
Properties
Tin(II) sulfideis a brown solid, insoluble in water, but soluble in concentrated hydrochloric acid. Tin (II) sulfide is insoluble in (NH4)2S
Tin(II) sulfide is made by reacting tin with sulfur. It can also be made by reacting tin(II) chloride with hydrogen sulfide.
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Monday, 26 March 2012
Differences between Stannic Oxide and Chromium oxide
Stannic Oxide is the dioxide SnO2 of tin that occurs in nature as cassiterite, is produced artificially as a crystalline powder when anhydrous, and is used chiefly in ceramic colors, in vitreous enamels and glazes as an opacifier, in glass, and in polishes
Stannic oxide is derived from tin. Widely known and used, tin comprises about 0.001 percent of the earth's crust. It is sometimes found alone, but generally is found as the oxide in the mineral cassiterite. Tin mines exist in England, Spain, Indonesia, Thailand, Zaire, Nigeria and China. Significant amounts of tin is also obtained through recycling. Tin is nontoxic, ductile, malleable, adheres to various metals and has a relatively low melting point. These properties lend to its usefulness as a rust-proofing material on iron, low-grade steels, copper, and copper alloys.
Tin forms two series of compounds, termed stannous and stannic. One of the most important compounds commercially is stannic oxide, which is useful as a catalyst in industrial processing, in ceramics and as a polishing powder for steel.
Chromium oxide is the inorganic compound of the formula Cr2O3. It is one of principal oxides of chromium and is used as a pigment. In nature, it occurs as the rare mineral eskolaite. Cr2O3 adopts the corundum structure, consisting of a hexagonal close packed array of oxide anions with 2/3 of the octahedral holes occupied by chromium. Similar to corundum, Cr2O3 is a hard, brittle material (Mohs hardness 8-8.5). It is antiferromagnetic up to 307 K, the Neel temperature. It is not readily attacked by acids or bases, although molten alkali gives chromites (salts with the Cr2O2−4 anion, not to be confused with the related mineral chromite). It turns brown when heated, but reverts to its dark green color when cooled. It is also hygroscopic.
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Sunday, 25 March 2012
Specifications of Stannous chloride dihydrate
Stannous chloride dihydrate
Synonyms Tin (II) chloride dihydrate
Molecular Formula SnCl2.2(H2O)
Molecular Weight 225.63
CAS Registry Number 10025-69-1
Density 2.71
Melting point 37-38 ºC
Boiling point 652 ºC
Water solubility 1187 g/L (20 ºC)
Stannous chloride dihydrate may be substituted effectively in numerous applications for Stannous Chloride Anhydrous. Product selection is contingent upon availability, price, and the purity of material. Nevertheless, the dihydrate generally is acknowledged to be more difficult to handle because of its low melting point. Although manufacturing techniques are critical to product quality, the dihydrate normally is purer with a higher stannous/stannic ratio. Reagent grade dihydrate was the only type approved in the Federal Registry for food applications. Its value as an antioxidant and as a corrosion inhibitor contributed to the premium price, which it commands.
Stannous Chloride Dihydrate is widely used in applications that require GMPs to be followed such as Oral Health Care and Pharmaceuticals
Stannous Chloride Dihydrate is not as commercially available as the Anhydrous, but it is preferred in many applications due to its higher purity.
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Synonyms Tin (II) chloride dihydrate
Molecular Formula SnCl2.2(H2O)
Molecular Weight 225.63
CAS Registry Number 10025-69-1
Density 2.71
Melting point 37-38 ºC
Boiling point 652 ºC
Water solubility 1187 g/L (20 ºC)
Stannous chloride dihydrate may be substituted effectively in numerous applications for Stannous Chloride Anhydrous. Product selection is contingent upon availability, price, and the purity of material. Nevertheless, the dihydrate generally is acknowledged to be more difficult to handle because of its low melting point. Although manufacturing techniques are critical to product quality, the dihydrate normally is purer with a higher stannous/stannic ratio. Reagent grade dihydrate was the only type approved in the Federal Registry for food applications. Its value as an antioxidant and as a corrosion inhibitor contributed to the premium price, which it commands.
Stannous Chloride Dihydrate is widely used in applications that require GMPs to be followed such as Oral Health Care and Pharmaceuticals
Stannous Chloride Dihydrate is not as commercially available as the Anhydrous, but it is preferred in many applications due to its higher purity.
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Thursday, 22 March 2012
What is Lithium nitrate used for?
Lithium nitrate is an inorganic compound with the blueprint LiNO3. It is the lithium alkali of nitric acid. It is fabricated by reacting lithium carbonate or lithium hydroxide with nitric acid.
Uses
This deliquescent colourless salt is an oxidizing agent used in the manufacture of red-colored fireworks and flares.
Lithium nitrate has been proposed as a medium to store heat collected from the sun for cooking. A Fresnel lens would be used to melt solid lithium nitrate, which would then function as a 'solar battery', allowing heat to be redistributed later by convection.
Properties
Upon thermal decomposition, LiNO3 gives lithium oxide (Li2O), nitrogen dioxide, and oxygen: 4 LiNO3 → 2 Li2O + 4 NO2 + O2
Other group I nitrates decompose differently, forming the nitrite salt and oxygen. Because of its relatively small size, the lithium cation is very polarizing, which favors the formation of the oxide.
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Uses
This deliquescent colourless salt is an oxidizing agent used in the manufacture of red-colored fireworks and flares.
Lithium nitrate has been proposed as a medium to store heat collected from the sun for cooking. A Fresnel lens would be used to melt solid lithium nitrate, which would then function as a 'solar battery', allowing heat to be redistributed later by convection.
Properties
Upon thermal decomposition, LiNO3 gives lithium oxide (Li2O), nitrogen dioxide, and oxygen: 4 LiNO3 → 2 Li2O + 4 NO2 + O2
Other group I nitrates decompose differently, forming the nitrite salt and oxygen. Because of its relatively small size, the lithium cation is very polarizing, which favors the formation of the oxide.
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Wednesday, 21 March 2012
Uses of Stannic Oxide
Stannic Oxide is the inorganic compound with the formula SnO2. The mineral form of SnO2 is called cassiterite, and this is the main ore of tin. With many other names (see infobox), this oxide of tin is the most important raw material in tin chemistry. This colourless, diamagnetic solid is amphoteric.
It crystallises with the rutile structure, wherein the tin atoms are six coordinate and the oxygen atoms three coordinate. SnO2 is usually regarded as an oxygen-deficient n-type semiconductor. Hydrous forms of SnO2 have been described in the past as stannic acids, although such materials appear to be hydrated particles of SnO2 where the composition reflects the particle size.
Tin dioxide occurs naturally but is purified by reduction to the metal followed by burning tin in air. Annual production is in the range of 10 kilotons. SnO2 is reduced industrially to the metal with carbon in a reverbatory furnace at 1200-1300 °C.
Uses
In conjunction with vanadium oxide, it is used as a catalyst for the oxidation of aromatic compounds in the synthesis of carboxylic acids and acid anhydrides.
Tin dioxide has long been used as an opacifier and as a white colorant in ceramic glazes. Its use has been particular common in glazes for earthenware, sanitaryware and wall tiles; see the articles tin-glazing and Tin-glazed pottery. Tin oxide remains in suspension in vitreous matrix of the fired glazes, and, with its high refractive index being sufficiently different from the matrix, light is scattered, and hence increases the opacity of the glaze. The degree of dissolution increases with the firing temperature, and hence the extent of opacity diminishes. Although dependant on the other constituents the solubility of tin oxide in glaze melts is generally low. Its solubility is increased by Na2O, K2O and B2O3, and reduced by CaO, BaO, ZnO, Al2O3, and to a limited extent PbO.
SnO2 wires are commonly used as the detecting element in carbon monoxide detectors.
Stannic Oxide coatings can be applied using chemical vapor deposition, vapour deposition techniques that employ SnCl4 or organotin trihalides e.g. butyltin trichloride as the volatile agent. This technique is used to coat glass bottles with a thin (<0.1 μm) layer of SnO2, which helps to adhere a subsequent, protective polymer coating such as polyethylene to the glass. Thicker layers doped with Sb or F ions are electrically conducting and used in electroluminescent devices. SnO2 has been used as pigment in the manufacture of glasses, enamels and ceramic glazes. Pure SnO2 gives a milky white colour; other colours are achieved when mixed with other metallic oxides e.g. V2O5 yellow; Cr2O3 pink; and Sb2O5 grey blue. SnO2 has been used as a polishing powder and is sometimes known as "putty powder", SnO2 is used in sensors of combustible gases. In these the sensor area is heated to a constant temperature (few hundred °C) and in the presence of a combustible gas the electrical resistivity drops. Doping with various compounds has been investigated (e.g. with CuO). Doping with cobalt and manganese, gives a material that can be used in e.g. high voltage varistors. Tin dioxide can be doped into the oxides of iron or manganese.
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It crystallises with the rutile structure, wherein the tin atoms are six coordinate and the oxygen atoms three coordinate. SnO2 is usually regarded as an oxygen-deficient n-type semiconductor. Hydrous forms of SnO2 have been described in the past as stannic acids, although such materials appear to be hydrated particles of SnO2 where the composition reflects the particle size.
Tin dioxide occurs naturally but is purified by reduction to the metal followed by burning tin in air. Annual production is in the range of 10 kilotons. SnO2 is reduced industrially to the metal with carbon in a reverbatory furnace at 1200-1300 °C.
Uses
In conjunction with vanadium oxide, it is used as a catalyst for the oxidation of aromatic compounds in the synthesis of carboxylic acids and acid anhydrides.
Tin dioxide has long been used as an opacifier and as a white colorant in ceramic glazes. Its use has been particular common in glazes for earthenware, sanitaryware and wall tiles; see the articles tin-glazing and Tin-glazed pottery. Tin oxide remains in suspension in vitreous matrix of the fired glazes, and, with its high refractive index being sufficiently different from the matrix, light is scattered, and hence increases the opacity of the glaze. The degree of dissolution increases with the firing temperature, and hence the extent of opacity diminishes. Although dependant on the other constituents the solubility of tin oxide in glaze melts is generally low. Its solubility is increased by Na2O, K2O and B2O3, and reduced by CaO, BaO, ZnO, Al2O3, and to a limited extent PbO.
SnO2 wires are commonly used as the detecting element in carbon monoxide detectors.
Stannic Oxide coatings can be applied using chemical vapor deposition, vapour deposition techniques that employ SnCl4 or organotin trihalides e.g. butyltin trichloride as the volatile agent. This technique is used to coat glass bottles with a thin (<0.1 μm) layer of SnO2, which helps to adhere a subsequent, protective polymer coating such as polyethylene to the glass. Thicker layers doped with Sb or F ions are electrically conducting and used in electroluminescent devices. SnO2 has been used as pigment in the manufacture of glasses, enamels and ceramic glazes. Pure SnO2 gives a milky white colour; other colours are achieved when mixed with other metallic oxides e.g. V2O5 yellow; Cr2O3 pink; and Sb2O5 grey blue. SnO2 has been used as a polishing powder and is sometimes known as "putty powder", SnO2 is used in sensors of combustible gases. In these the sensor area is heated to a constant temperature (few hundred °C) and in the presence of a combustible gas the electrical resistivity drops. Doping with various compounds has been investigated (e.g. with CuO). Doping with cobalt and manganese, gives a material that can be used in e.g. high voltage varistors. Tin dioxide can be doped into the oxides of iron or manganese.
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