Abstract
A data base is being developed for calculation of quasi-binary and quasi-ternary phase diagrams of ceramic systems. The initial segment of this base covers combinations of Cr 2O 3, MgO, Aℓ 2O 3, Fe 2O 3 Fe 3O 4 and “FeO”. Lattice Stability, Solution and Compound Phase Parameters were derived covering the liquid, spinel, periclase and corundum phases in systems composed of these oxides. These parameters permit calculation of the thermochemical properties and phase diagrams of combinations of these oxides in good agreement with limited experimental data. This base has been extended to include SiO 2 and CaO by carrying out an analysis of the thirteen binary systems composed of the above mentioned systems with silica and calcium oxide. The current base of eight oxides can thus be employed to compute fifty six ternary systems. Isothermal sections in the MgO-Fe 3O 4-Cr 2O 3 are presented between 2800K and 1600K illustrating the usefulness of the data base.
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