Abstract
The K 2O–Al 2O 3–SiO 2 system has been thermodynamically assessed. The associate species model was applied to the liquid phase while the solubility of SiO 2 in KAlO 2 has been treated with a multi-sublattice model. The resulting new databank was used for the representation of the phase equilibria in the ternary system including several quasi-binary sections of the ternary diagram. The calculated phase relations are in good agreement with the experimental data. The phase equilibria in the unmeasured region were proposed on the basis of the obtained new databank.
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