Tungsten Carbide Powder Prepared from Violet Tungsten Oxide

With high chemical activity and hydrogen reduction rate, violet tungsten oxide has become a significant raw material for preparing tungsten carbide powder. High-quality tungsten carbide powder is usually prepared by carbonization of ultra-fine tungsten powder, which is obtained from violet tungsten oxide.

Tungsten carbide is a compound composed of tungsten and carbon. Its molecular formula is WC, and its molecular weight is 195.85. Tungsten carbide is a kind of black hexagonal crystal with metallic luster. It not only has high hardness, but good conductivity. Tungsten carbide is insoluble in water, hydrochloric acid and sulfuric acid, and soluble in the mixed acid of nitric acid and hydrofluoric acid. In terms of its application, tungsten carbide is an important material for the production of hard alloy. Usually, tungsten carbide powder with high quality is the key to refine the grain size, hardness, strength, wear resistance and other properties of hard alloy.

In general, tungsten carbide powder is made from tungsten powder and carbon black by carbonization at a certain temperature. In order to obtain tungsten carbide powder with high quality, ultrafine tungsten powder should be first obtained. Violet tungsten oxide is an ideal material for the preparation of tungsten powder. Tungsten powder made from violet tungsten oxide often has small grain size and high quality.

Specially, violet tungsten oxide is composed of deformed octahedron. There are rich cracks inside violet tungsten oxide particle and the particle surface is rough. With unique needle structure, violet tungsten oxide has high chemical activity and high rate of hydrogen reduction. Therefore, when used as the raw material for preparing  tungsten carbide powder, it can effectively improve the production efficiency. Moreover, violet tungsten oxide is cheap. Its application can greatly reduce the production cost as well. It can be seen that violet tungsten oxide is a high-quality material for the production of tungsten carbide powder.

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