Activation Energy for Conduction in Y2O3-Stabilized Zirconia

Abstract

Abstract: The ac conductivity spectra were measured in the temperature range from 313 to 473K for a Y₂O₃-stabilized ZrO₂ (YSZ). Then the dc
conductivity was deduced and its temperature dependence analyzed. It was shown that, at low temperatures, the activation energy for conduction
in YSZ increases with increasing temperature. This experimental phenomenon is rather different with those observed previously in the high temperature
range in which the activation energy was found to decrease with increasing temperature. Based on the analyses of the mechanisms for disassociation and
migration of oxygen vacancies in the materials, a reasonable explanation for the temperature dependence of the activation energy for conduction in YSZ was
proposed.

Key words: ionic conductivity, activation energy for conduction, defect association, ZrO₂-based solid electrolytes

CLC Number:

O482
TM28

LI Ying,GONG Jiang-Hong,XIE Yu-Sheng,TANG Zi-Long,CHEN Yun-Fa,ZHANG Zhong-Tai. Activation Energy for Conduction in Y₂O₃-Stabilized Zirconia[J]. Journal of Inorganic Materials.

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Activation Energy for Conduction in Y₂O₃-Stabilized Zirconia

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