A Chemical Approach of the Molecular Entity Vacancy Model to the CaO-Al2O3-SiO2 Ternary Silicate Melt

Abstract

A chemical approach of the molecular entity vacancy model (MEVM) to the CaO-Al2O3-SiO2 ternary silicate melts has been suggested. The activities of all components in the melts were simultaneously predicted by using only the binary parameters of its sub-binary melts which were determined by fitting the activities of their two components. The results indicated that the predicted values of activity of SiO2 were in good agreement with the experimental data at both temperatures 1823 K and 1873 K, and those of CaO and Al2O3 were in reasonable agreement with the experimental data at 1823 K and were smaller than the graphical integration data of the Gibbs-Duhem equation at 1873 K. The approach may be extended to some solution systems with the chemical interaction.