A new method has been developed to solve the problem of complete integration of the Gibbs-Duhem equation along phase boundaries in a c-eomponent and c-l-phase system. Two variables, (△1)1i=Di D1i and (△i)1i=D1 D1i, are introduced into the Gibbs-Duhem equation for multicomponent systems. And the function φ suggested by Chou for use in a miscibility gap of ternary systems is extended. Activities of componention whole phase boundaries may be calculated from the known experimental values of α1 by means of the modified Gibbs-Duhem equation without integral difficulties.

本文使用自行设计的热重装置对MoO2-M0系中间氧化物热力学稳定性及金属-氧化物平衡作TH2O/H2气氛下气态平衡法的研究。在PH2O/PH2从0.123到0.507，温度由625至912℃范围内直接测定了反应1 2MoO2+H2=1 2Mo+H2O（g）的平衡常数。平衡常数Kp与绝对温度T之间的关系可表达为方程：lgKp=1.612-2257.7 T。实验表明，MosO，MoO和Mo2O3等中间氧化物在本研究的温度和氧压范围内不能作为热力学稳定相存在。