- ASM INTERNATIONAL
The constant-pressure heat capacities of binary oxides have been estimated using the Morse potential and the Debye model. The Born repulsion parameters of oxides, which are necessary for determining the parameters of the Morse potential, have been determined empirically for metal atoms in oxides belonging to every period of the periodic table. Using the parameters thus determined, the thermal expansion coefficient, the Gruneisen constant, and the Debye temperature of various oxides have been calculated, and from those parameters the constant-volume and the constant-pressure heat capacities have been calculated for a wide temperature range. The calculated constant-pressure heat capacities thus obtained are in excellent agreement with the experimental data except for the anomalous heat capacities due to vacancy formation and phase transitions.
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