Application of molecular interaction volume model in vacuum distillation of Pb-based alloys

摘要

A method is presented for calculating the separation coefficients of Pb-Au and Pb-Sn alloys in vacuum distillation based on molecular interaction volume model (MIVM). A significant advantage of the model lies in its ability to predict the thermodynamic properties of liquid alloys using only binary infinite activity coefficients. The calculated results of Pb-Ag, Pb-Au, Pb-Sb, Pb-Sn and Sb-Sn show good agreement with experimental data in literature. It shows that the prediction effect of the proposed method is of better stability and reliability because the MIVM has a good physical basis.