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中文摘要：
利用X射线衍射仪、扫描电镜和比表面仪研究了WO3还原成W粉过程中的相结构、粉末形貌和粒度的演变过程及机理。结果表明WO3在还原过程中依次转变为WO2.90、WO2.72、Wo2，最终被还原成W。在WO3氢还原成W粉的过程中，WO3具有的平滑规则六面体形貌会转变为粗糙六面体，并随着还原过程进行，较大的二次颗粒分解成小颗粒。在WO3氢还原成WO2.90和WO2.72的过程中，粉末的比表面积不断增大，粉末粒度不断减小，但在WO2.72还原为WO2和WO2还原为W的过程中，粉末比表面减小，粉末的粒度不断增大。
英文摘要：
The phase structure, morphology and particle size evolutions of tungsten oxide reduced by hydrogen were studied by X-ray diffractometer, scanning electron microscope and specific surface area meter. It is shown that the phase structure evolution is WO3 WO2.90- WO2. 72-WO2-W. The surface morphology of powder changes from a smooth to a rough particle and eventually the bigger secondary particles turn to several smaller particles. The specif- ic surface area of the powder increases during WO3 reducing to WO290-WO2.72, while specific surface area of the powder decrease when WO2.72 reducing to WO2 and WO2 reducing to W.
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