Thermodynamic assessment of the Ce–O system in solid state from 60 to 67mol.% O

Abstract

Abstract A thermodynamic dataset was developed for the central part of the Ce–O system covering the range between CeO and CeO up to about 2000K. All literature data for the thermodynamic functions, the phase diagram and crystallography were critically assessed. The modeling of the phases takes into account their crystal chemistry including order–disorder behavior. From the dataset, diagrams were calculated for the (1) heat capacities of CeO and CeO, (2) enthalpy increment of CeO, (3) chemical potentials of oxygen in CeO, (4) partial enthalpies of oxygen in CeO, (5) the partial phase diagram of Ce–O and (6) chemical potentials of oxygen in the two-phase areas. These diagrams reproduce fairly well the experimental data from literature.