Coupled Thermodynamic Modeling and Experimental Study of the SnO2-SnO-CaO-SiO2 System

Book excerpt: "The prediction of thermodynamic properties and phase equilibria of an oxide system can play an important role in the development and understanding of metallurgical, ceramic and geological processes. The thermodynamic databases, developed by a critical evaluation and optimization of all existing thermodynamic properties and phase diagram, can help in understanding the reaction mechanism in various industrial processes and in developing new technology for various industries.As part of a large thermodynamic database development for glassmaking applications, all solid and liquid oxide phases of the Sn-Si-Ca-O system were critically evaluated and optimized in the present study. All the unary, binary and ternary systems have been critically evaluated and optimized based upon the available phase equilibrium and thermodynamic data. Particularly, the liquid solution was described by the Modified Quasichemical Model with consideration of both SnO and SnO2. Due to the lack of the phase diagram data, phase diagram experiments of the SnO2-SiO2 system were performed for the first time using the quenching method followed by Electron Probe Micro-Analysis and X-Ray Diffraction for phase identification. The optimization results of all systems in this study is self-consistent. All the thermodynamic calculations in the present study were carried out using FactSageTM thermodynamic software." --