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Citation: Li Ying, ng Jiang-Hong, Tang Zi-Long, Xie Yu-Sheng, . Temperature-Independent Activation Energy for Ionic Conduction of Zirconia Based Solid Electrolytes[J]. Acta Physico-Chimica Sinica, ;2001, 17(09): 792-796. doi: 10.3866/PKU.WHXB20010906 shu

Temperature-Independent Activation Energy for Ionic Conduction of Zirconia Based Solid Electrolytes

1.
Institute of Chemical Metallurgy,Chinese Academy of Sciences,Beijing　100080;State Key Laboratory of New Ceramics and Fine Processing,Department of Materials Science and Engineering,Tsinghua University,Beijing　100084

Corresponding author: ,
Received Date: 20 January 2001
Available Online: 15 September 2001

Previous studies have shown that the temperature dependence of the ionic conductivity of zirconia based solid electrolytes exhibit an unusual nonlinear Arrhenius behavior and,as a result, the activation energy for ionic conductivity resulting from the analysis according to the classical Arrhenius equation is temperaturedependent.In this paper,a modified Arrhenius equation was proposed,based on the measurement and analysis of the conductivity for three kinds of Y2O3stablized ZrO2,to describe the temperature dependence of the ionic conductivity.It was found that the activation energy deduced from the modified Arrhenius equation is a constant independent of temperature.The validity of such a temperatureindependent activation energy was further discussed based on the transitionstate theory in physical chemistry.
- Ionic conductivity;Activation energy;Solid electrolyte;Zirconia;Nonlinear Arrhenius behavior
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