Thermodynamic Reassessment of ZrO2-CaO System

In this work, several thermodynamic assessments adopted widely for ZrO2–CaO system are reviewed and examined, the existing discrepancies are summarized, and a new assessment is carried out based on the formation enthalpy of two compounds (CaZr4O9 and Ca6Zr19O44) and experimental activity data concer...

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Published inJournal of the American Ceramic Society Vol. 92; no. 5; pp. 1098 - 1104
Main Authors Wang, Kun, Li, Chong He, Gao, Yong Hui, Lu, Xiong Gang, Ding, Wei Zhong
Format Journal Article
LanguageEnglish
Published Malden, USA Blackwell Publishing Inc 01.05.2009
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Summary:In this work, several thermodynamic assessments adopted widely for ZrO2–CaO system are reviewed and examined, the existing discrepancies are summarized, and a new assessment is carried out based on the formation enthalpy of two compounds (CaZr4O9 and Ca6Zr19O44) and experimental activity data concerning cubic solid solution. The thermodynamic parameters of all phases have been optimized by the least squares minimization procedure, a self consistent set of the optimized Gibbs energy parameters has been derived, which can be safely used to extrapolate into the multicomponent system. Compared with experimental data and the results in this work as well as the results reported previously, it is demonstrated that the present thermodynamic assessment is in better agreement with most of the experiments.
Bibliography:istex:40A18E313A52B7A20D77C6F45164F3FE7A1B7C67
ark:/67375/WNG-KZ716596-W
ArticleID:JACE02942
T. Bessmann—contributing editor
This research was financially supported by Science and Technology Commission of Shanghai Municipality (06XD14032, 08DZ2201200), The National Basic Research Program (973 Program, 2007CB613606), The National High Technology Research and Development Program of China (863 Program, 2006AA06Z12, and 2006AA11A189), and The National Funding of Nature Science (NSFC 50774052).
ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2009.02942.x