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500℃时以露点一定但流速不同的氢还原光谱纯三氧化钨粉,以X射线检验中间产物相。研究表明,β-钨的生成与氢流速有较大关系;只有在适当的氢流速,能保证试样周围环境有较高的还原气氛,但又有足够的水蒸气稳定β-钨时,β-钨的形成才有较大的趁势。研究还表明,在β-钨至α-钨的转变温度以下,只要低露点的氢气流速足够大,WO_(2.90)是可以直接被还原成α-钨的。
500 ℃ dew point but at a certain flow rate of hydrogen reduction spectroscopy of pure tungsten oxide powder, X-ray examination of the intermediate phase. The results show that the generation of β-tungsten has a great relationship with the hydrogen flow rate. Only when the appropriate hydrogen flow rate can ensure a high reducing atmosphere around the sample, but there is enough water vapor to stabilize β-tungsten, β - The formation of tungsten have greater advantage. The study also shows that WO_ (2.90) can be directly reduced to α-tungsten as long as the low dew point hydrogen flow rate is sufficiently large below the β-tungsten to α-tungsten transition temperature.