Abstract
Phase relations in BaO-In2O3-B2O3 system were experimentally and theoretically studied. Firstly, phase equilibria in B2O3-rich corner at 1298 and 1323K were measured with EPMA and XRD. Then, thermodynamic assessment was performed based on the measured phase relations in this work and from literatures by CALPHAD method using Thermo-Calc software. The intermediate phases were treated as stoichiometric compounds, and the liquid phase was described by the two-sublattice ionic liquid model (In3+, Ba2+)p(O2−, BO33−, B4O72−, B3O4.5)Q. A set of self-consistent thermodynamic parameters was obtained and the calculated phase diagrams and thermochemical properties conform well to the measurements.
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