Violet tungsten oxide powder may be applied for manufacturing nano-ceramic color master. Violet tungsten oxide can also be used to prepare tungsten powder and tungsten carbide powder with the characteristics of fine and uniform particle size, concentrated particle size distribution, and good dispersibility. Therefore, violet tungsten oxide has a good development prospect in the production of W powder and WC powder.
Some researchers have studied the effects of yellow tungsten oxide, blue tungsten oxide and violet tungsten oxide produced by the same batch of APT calcination on the particle size of tungsten powder. The results show that:
1. Different raw materials of tungsten oxide significantly affect the particle size of tungsten powder;
2. The chemical activity of tungsten oxide is related to its crystal surface structure and crystal defects, in addition to its specific surface area, particle size and morphology;
3. The hydrogen reduction of violet tungsten oxide begins not only at the active center of the polymer surface but also from the interior of the polymer. Therefore, when the violet tungsten oxide is reduced by hydrogen, the tungsten powder is formed at a high speed, a large number of crystal nuclei, and a fine particle size.
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