本文在多元多相体系变通的Gibbs-Duhem方程基础上，提出相界上的类Margules方程，用解析方法替代相界上Gibbs-Duhem方程图解积分，并能克服图解积分中出现的一些固有问题。

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.

The nonstoichiometry of the equilibrium phases is an important aspect in the study of equilibrium between transition-metals and their oxides. This paper reports our measurement on the deviation from stoichiometry in oxygen-deficient MoO2-x. A diagram showing real oxygen potential isotherms for non-stoichiometric MoO2 and Mo in equilibrium was given. The correction for the standard free energy of formation of MoO2 has been conducted and the Smiltens' intergration used for the pure metal side has been discussed.

据等温等压多相平衡Gibbs能最小原理并应用Lagrange未定乘数法导出多元系组元化学位和平衡成分关系式。由此给出三元系两相共存区边界上由一已知组元活度计算它组元活度的解析递推式。该结果被推广到k元k-1相平衡共存区相界。计算结果与实验值符合得较好。

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。