Vaporization and Thermodynamic Properties of SrO–Al2O3 Ceramics at High Temperatures

The vaporization processes and thermodynamic properties of SrO–Al2O3 ceramics containing 33.3, 20, and 10 mol % strontia were studied using high-temperature differential mass spectrometry. The vapor composition and partial pressures of vapor species over the studied samples, the component activities, Gibbs energies of formation from the oxides, and excess Gibbs energies were determined at 2450 K and 2550 K. Significant negative deviations from the ideality were observed in the SrO–Al2O3 system in the range of temperatures studied.