Title: Study of thermodynamic properties of nonstoichiometric phase <Zr1-zCezO2-x> with compound energy model
Authors: Huang, Shuigen ×
Li, Lin
Van der Biest, Omer
Vleugels, Jef
Wang, Peiling #
Issue Date: Sep-2002
Publisher: Editorial Board of Journal of Materials Science and Technology
Series Title: Journal of Materials Science & Technology vol:18 issue:5 pages:422-426
Abstract: Using compound energy model (CEM), the thermodynamic properties of <CeO2-y> and <Zr1-zCezO2-x> were evaluated. The evaluation was based on the optimization of ZrO2-CeO2 and ZrO2-CeO1.5 systems, as well as the miscibility gap in CeO1.5-CeO2 system. Except the cubic fluorite structure phase assessed with compound energy model, all the other solution phases were assessed with subsitutional solution model. The model parameters were evaluated through fitting the selected experimental data by means of thermodynamic optimization. A set of parameters with thermodynamics self-consistency was obtained and satisfactorily described the complex relation between y in <CeO2-y> and the partial pressure of oxygen at different temperatures, also the interdependence among miscellaneous factors such as temperature, oxygen partial pressure, the reduction amount of CeO2 as well as the nonstoichiometry in cubic phase <Zr1-zCezO2-x>. The calculated results seem to be reasonable when put into the explanation of pressureless sintering of CeO2-stabilized ZrO2 powder compacts at a controlled oxygen partial pressure.
ISSN: 1005-0302
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Department of Materials Engineering - miscellaneous
Physical Metallurgy and Materials Engineering Section (-)
× corresponding author
# (joint) last author

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