Critical thermodynamic evaluation of oxide systems relevant to fuel ashes and slags. Part 3: Silica–alumina system

The Al2O3–SiO2 system was reassessed using the associate species model for the liquid and the sublattice and associate species model for the mullite. The available phase diagram data were collected and evaluated for the purpose of improving the solution database. The new data for the liquid phase and mullite are compatible with data for the pure stoichiometric component oxides from the FACT Pure Substance database. The phase equilibria re-calculated using the improved solution data are in good agreement with experimental data. This work continues the studies concerning the thermodynamic assessment of oxide systems relevant to ashes and slags.