Thermodynamic Properties of Cerium Dioxide in the Condensed State

As part of the further development of the IVTANTERMO information and reference system, the entire set of experimental data on the thermodynamic properties of cerium dioxide available in the literature was critically analyzed and processed. An equation was obtained that approximates the temperature d...

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Bibliographic Details
Published in:High temperature 2022-12, Vol.60 (6), p.756-760
Main Author: Aristova, N. M.
Format: Article
Language:English
Subjects:
Atoms and Molecules in Strong Fields
Cerium oxides
Classical and Continuum Physics
Dioxides
Enthalpy
Industrial Chemistry/Chemical Engineering
Laser Matter Interaction
Liquid phases
Materials Science
Physical Chemistry
Physics
Physics and Astronomy
Reference systems
Specific heat
Temperature dependence
Thermodynamic properties
Thermodynamics
Thermophysical Properties of Materials
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Summary:As part of the further development of the IVTANTERMO information and reference system, the entire set of experimental data on the thermodynamic properties of cerium dioxide available in the literature was critically analyzed and processed. An equation was obtained that approximates the temperature dependence of the heat capacity of crystalline CeO 2 in the interval 298.15–3083 K. There are no experimental data for liquid cerium dioxide in the literature. The missing thermodynamic quantities (enthalpy of melting, heat capacity of the liquid phase) are obtained by estimation. Particular attention is paid to the transition between the oxidized and reduced forms of cerium Ce 4+ ⇄ Ce 3+ , as a result of which in the CeO 2 –CeO 1.5 system, a number of intermediate oxides are formed.
ISSN:0018-151X
1608-3156
DOI:10.1134/S0018151X22040095