Nano grain size violet tungsten oxide may be produced by APT mild reduction method. The nano violet tungsten oxide prepared by this method has the following advantages:
1. High purity, high crystallinity, and stable thermal performance;
2. Loose powder structure; The shape of grain is mostly spherical and the particle size distribution is even;
3. Large surface area, single pore structure, average particle size up to 26.1 nm, which provides a good prerequisite for the preparation of high-quality tungsten carbide nanopowder (WC powder for producing tungsten carbide alloy).
Tungsten carbide is important tool and structural material that has wide application in many fields. Its hardness and strength are determined by crystal size of tungsten carbide powder.
4. In producing process, the diffusion and effusion of the vapor is effectively controlled by lowering the reduction temperature, slowing down the pushing rate of boat, reducing the loading capacity, and increasing the flow rate of hydrogen.
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