Tungsten Oxide Producing

Tungsten oxide is an important raw material for producing carbide. With the carbide industry development the quality and performance of the products have become more sophisticated. So to understand the performance of tungsten oxide for producing carbide with high performance has a significant advantage. Almost all tungsten oxides are based on APT (ammonium noon) as raw materials and calcined to produce. With different calcine conditions, the tungsten oxide powder is different. For example, using the same batch APT as raw material through different calcination process will produce violet tungsten oxide, blue tungsten oxide and yellow tungsten oxide. Each one has its own unique crystal structure, so they are not quite the same physical properties.

Violet tungsten oxide phase component is WO_2.72 for its unique crystal structures so much use for producing fine tungsten oxide powder and fine tungsten carbide powder. Blue tungsten oxide phase component in theory is WO_2.97. But in the actual blue tungsten oxide is typically a mixture of many tungsten oxides, including yellow or violet tungsten oxide phase. Yellow tungsten oxide has various crystal forms with different calcination temperature will obtain different WO₃ crystal form. At a calcination temperature of 700 ℃ may producing orthorhombic tungsten trioxide.



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