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Calcium Tungstate 424

Calcium tungstate is a white crystalline with tetragonal system. It decomposes in hot hydrochloric acid. Also, it is slightly soluble in water and ammonium chloride solution. Its relative density is 6.062g/cm3, chemical formula is CaWO4, where W has a valence of +6. Producing Processes 1. Processed from natural scheelite. 2. Adopt tungsten trioxide and calcium carbonate as raw materials, and burn at the temperature of 1070°C. 3. Made by the reaction of calcium oxide/calcium hydroxide and tungsten oxide/tungsten hydroxide in…

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Sodium Tungstate 493

Sodium tungstate is a kind of white shiny crystalline or crystalline powder, whose chemical formula is Na2WO4. It is weathered in the air. Also, it is insoluble in ethanol, slightly soluble in ammonia, and soluble in water, which is slight alkalinity. It is also known for its anti-diabetic effects. Sodium tungstate is prepared from tungsten ores used to manufacture tungsten by reducing it. It is used as catalyst for epoxidation of alkenes and oxidation of alcohols into aldehydes or ketones…

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Metatungstic Acid 727

Metatungstic acid is a highly soluble and colorless crystal with a density of 3.93g/cm3. It is a kind of polytungstic acid with the formula H6 [H2 (W3O10) 4] ? nH2O, in which n is 10 or 23. It decomposes at 50°C. Its solubility is 88.57g/100cm3 (in water, at the temperature of 25°C). Metatungstic acid can be made from the salt of metatungstic acid (metatungstate). Metoplutamate is an important industrial product developed in the late 1970s. It is mainly used as…

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Ammonium Tungstate 428

Ammonium tungstate is a kind of white rhombic crystal, which is soluble in water and insoluble in ethanol. Its chemical formula is (NH4)10W12O41~xH2O. And It loses four molecular of crystal water at the temperature of 100℃. At the temperature of 20°C, its solubility in water is less than 2%. Ammonium tungstate is one of tungsten compounds and is an important intermediate material for tungsten metallurgy industry. It is an important raw material for producing ammonium paratungstate, ammonium metatungstate and phosphorus…

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Tungsten Slurry 427

Tungsten slurry is composed of tungsten powder, inorganic binder phase and organic carrier, which has extremely high melting point, good conductivity and thermal conductivity. It is widely used in high temperature co-firing technology. Tungsten powder provides the premise for good sealing. The role of inorganic binder phase is to help sinter and provide sealing strength. The organic carrier is divided into three parts: resin, solvent and additive. Surfactant, leveling agent, antifoaming agents and other organic additives. Applications Melting point of…

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Waste Tungsten Powder 440

Waste tungsten powder is a tungsten powder that cannot meet the requirements of the follow-up production dingally and may be recycled during production, logistics transportation, storage and use. Recycling waste tungsten powder can improve economic efficiency and reduce environmental pollution. In the process of powder metallurgy, a lot of waste tungsten powder is produced for various reasons. In the process of logistics transportation, storage and use, oxidation may occur, or other substances, it may be adulterated to cause insufficient purity,…

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Ready to Press Tungsten Powder 432

Ready to press tungsten powder is a kind of powder used for cemented carbide sintering. It has excellent physical and chemical properties, good fluidity and compressibility, high chemical content and good carbon control. Characteristics Ready to press tungsten powder has stable apparent density, good liquidity and compressibility. Its chemical content is high, and amount of carbon control is good. Applications Ready to press tungsten powder is a raw material sintered in cemented carbide. During sintering, a series of physicochemical processes…

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Nano Scandium Oxide Doped Tungsten Powder 467

The scandium oxide of nano scandium oxide doped tungsten powder is evenly distributed and has small particles. It can produce excellent performance of the scandium tungsten matrix, improve the anti-ion bombardment performance, and help to improve cathode emission uniformity. Preparation Nano scandium oxide doped tungsten powder can be liquid-solid doping method by the decomposition of the reduction process. Scandium oxide evenly covered the surface of tungsten particles, pinning the role of inhibiting grain growth. Applications Nano scandium oxide doped tungsten…

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Tungsten Aluminum Powder 440

Tungsten aluminum powder is a kind of doped tungsten powder, which is prepared by tungsten powder mixed with aluminum. Its aluminum content is very low, and the oxygen content can be determined by the pulse heating coulometry. Aluminum is volatile at high temperatures, which may affect the determination of oxygen content. So It usually adopts the pulse heating coulombic oxygen method, this method is accurate, reliable, sensitivity and the minimum detection limit of the instrument can meet the production and…

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Rare Earth Doped Tungsten Powder 429

Rare earth doped tungsten powder is a kind of tungsten powder doped with rare earth elements. It has a finer grain size, higher purity, and a regular cubic shape of powder, with higher potassium content. The doped tungsten products prepared with rare earth doped tungsten powder have excellent properties at high temperature and normal temperature. Under the condition of the same reduction process, rare earth elements can reduce the reduction rate of doped tungsten powder, split time later. In the…

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