High Temperature Mass Spectrometric Study of Vaporization and Thermodynamic Properties in the Cs2O–Al2O3 System

Using the Knudsen effusion mass spectrometric method in the temperature range 1100–1520 K, the vaporization processes and thermodynamic properties in the Cs2O–Al2O3 system were studied. The data on the component activities were fitted using the Redlich–Kister polynomial to calculate the excess Gibbs energies in this system for the first time. Thermodynamic properties found in the Cs2O–Al2O3 system were discussed in the frame of the generalized lattice theory of associated solutions. It was found that the Cs–O–Al bonds made the most valuable contribution to the negative deviations from the ideality in the Cs2O–Al2O3 system at the temperature 1200 K.