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本文以热重分析法研究了650-850℃范围内W-O系在WO_2与W间的平衡。结果表明,在690℃以上W_3O不是一个平衡相。对于反应1/2WO_2(s)+H_2(g)=1/2W(s)+H_2O(g),本文得出: lgK_p=-(2186/T)+1.617 本文还得到WO_2(s)的标准生成自由焓、标准生成热及标准熵。
In this paper, the thermogravimetric analysis of W-O system in the range of 650-850 ℃ WO_2 and W balance. The results show that W_3O is not an equilibrium phase above 690 ℃. For the reaction 1 / 2WO 2 (s) + H 2 (g) = 1 / 2W (s) + H 2 O (g), we find: lgK_p = - (2186 / T) +1.617 We also obtain the standard formation of WO 2 Free enthalpy, standard heat of formation and standard entropy.