由含化合物体系的二元相图提取活度

Calculation of Activities from Phase Diagrams Involving Intermediate Compounds

本文提出了一种由化合物体系的二元相图提取组元活度数据的新方法。在该方法中,组元的活度系数是组成的函数。用该式计算Mg—sn体系的活度表明,它与实验值符合较好。

A new method for calculating activities and activity coefficients of components from phase diagram at a fixed temperature is introduced. Analytical expressions for the calculation of activities are presented, in which activities of components are functions of the composition. The application of the expressions to Mg-Sn system shows that this method is efficient.