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Ammonium tungstate is a kind of tungsten compound. It is an important intermediate in tungsten metallurgical industry. The white trapezoid crystal is dissolved in water and insoluble in alcohol. It loses four molecular crystalline water at 100.

Tungsten oxide is a tungstic anhydride and a tungstate product. Tungsten oxide is an oxide of tungsten. It is an important intermediate for the preparation of tungsten from tungsten ore. Tungsten oxide can be used to produce chemical products, such as paint and coatings, petroleum industry catalysts, etc.

Tungsten trioxide exists in the form of hydrate in nature, including mineral forms: wolfram (WO3? H2O), water tungsten oxide (WO3? 2H2O) and water tungsten oxide. These minerals are rare and very rare secondary tungsten deposits.

Tungsten carbide powder (WC) is the main raw material for producing cemented carbide, chemical formula WC. The full name is Wolfram Carbide, tungsten carbide powder is black six square crystal, has metallic luster, hardness is similar to diamond, it is a good conductor of electricity and heat.