Nanometer violet tungsten oxide may be applied for producing heat insulation coating, and therefore be used in building, car and airplane where require high heat insulation and high transparency. Violet tungsten oxide can also replace blue tungsten oxide for hydrogen reduction to produce tungsten powder.
Compared with tungsten powder prepared by using blue tungsten oxide as raw material, the tungsten powder produced by adopting violet tungsten oxide as raw material has the following advantages: the production capacity can be increased by more than 50%, and the particle size and particle size distribution of tungsten powder are quite stable, which is less affected by the loading amount.
Using violet tungsten oxide as raw material, the BET particle size of the ultrafine tungsten powder prepared in accordance with the conventional process can be less than 0.1μm, and the BET particle size of the ultrafine tungsten carbide powder can be less than 0.3μm. The ultrafine tungsten carbide powder obtained by using violet tungsten oxide as raw material can be used to produce ultrafine grained cemented carbide with an average grain size of less than 0.5μm. Therefore, violet tungsten oxide shows good development prospects.
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