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
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Previous studies have shown that the temperature dependence of the ionic conductivity of zirconia based solid electrolytes exhibit an unusual nonlinear Arrhenius behavior and,as a result, the activation energy for ionic conductivity resulting from the analysis according to the classical Arrhenius equation is temperaturedependent.In this paper,a modified Arrhenius equation was proposed,based on the measurement and analysis of the conductivity for three kinds of Y2O3stablized 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 temperatureindependent activation energy was further discussed based on the transitionstate theory in physical chemistry.
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