本文用变通的Gibbs-Duhem关系式,通过θ函数进行积分变换,并根据相图,结合化合物生成自由能与温度的关系式,得到了一个判别生成自由能是否准确的方法.然后据此对有关数据进行了选择,并计算In-As,Ga-As两个二元系中组分的活度.与文献数据相比较,本文结果较为合理.
A criterion for ascertaining the accuracy of the free energy of formation ofan intermetallic compound has been obtained from a combination of the modifiedGibbs-Duhem equation,the function transformation and the phase diagram.Thefree energies of formation of InAs and GaAs have been selected on the basis ofthe above-mentioned criterion.The activities in the binary In-As and Ga-As sys-tems are then calculated by means of the modified Gibbs-Duhem equation in con-junction with the properly chosen free energies of formation of the compoundsInAs and GaAs and the binary In-As and Ga-As phase diagrams.
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