Thermodynamic Calculations Of Chemical Solubilities Of Gases In Oxide Melts And Glasses

In this paper a model is presented to predict the solubilities of sulfides, sulfates, phosphates, carbonates and halides in multicomponent oxide melts and glasses (Si20-Al203-Na20-K20-Ca0-Mg0-..) from thermodynamic data for the pure substances, and from a knowledge of the activities of the basic component oxides (Na20, K20, Ca0, Mg0,..) in the melt. These activities may be known experimentally, or may be predicted from other models such as the quasichemical model. The model is particularly useful for the understanding of sulfate behaviour in glass melts which often determines the fining process during the melting of technical glasses.