Premium
Thermodynamic Reassessment of ZrO 2 –CaO System
Author(s) -
Wang Kun,
Li Chong He,
Gao Yong Hui,
Lu Xiong Gang,
Ding Wei Zhong
Publication year - 2009
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2009.02942.x
Subject(s) - thermodynamics , gibbs free energy , work (physics) , enthalpy , materials science , standard enthalpy change of formation , experimental data , calphad , thermodynamic databases for pure substances , thermodynamic process , material properties , chemistry , phase diagram , mathematics , physics , phase (matter) , statistics , organic chemistry
In this work, several thermodynamic assessments adopted widely for ZrO 2 –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 (CaZr 4 O 9 and Ca 6 Zr 19 O 44 ) 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.