Tungsten Oxide Reduction Process and Mechanism

Tungsten as a strategic non-ferrous metals, because nature has a high melting point, high elastic modulus, high hardness, good thermal conductivity and excellent fracture toughness, they are applied to cemented carbide, high-density tungsten alloy, tungsten wire, tungsten and many other fields. With the development of modern industrial technology, the traditional tungsten powders made of tungsten products has been difficult to meet industry needs. And a large part of the quality factor depends on the performance of tungsten products tungsten powder raw material, and therefore its need to prepare good performance tungsten products, must be prepared by the excellent quality of tungsten powder.

You can make use of X-ray diffraction, scanning electron microscopy and surface area analyzer to study the process of W powder phase structure, evolution and mechanism of powder morphology and particle size reduction of WO3. WO3 during the restore sequence into WO2.9, WO2.72, WO2, eventually reduced to W. W in WO3 powders hydrogen reduction process, smoothing rule WO3 has hexahedral rough topography becomes a hexahedral, and with the reduction process, the larger secondary particles into smaller particles. In the hydrogen reduction of WO3 and WO2.72 WO2.90 process, the powder specific surface area is increasing, decreasing powder size, but reduced to the WO2.72 and WO2 WO2 reduced to W in the process, the powder specific surface decreases, increasing the particle size of the powder.

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