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Y2O3稳定ZrO2材料的电导活化能
引用本文:李英,谢裕生,陈运法,龚江宏,唐子龙,张中太.Y2O3稳定ZrO2材料的电导活化能[J].无机材料学报,2002,17(4):811-816.
作者姓名:李英  谢裕生  陈运法  龚江宏  唐子龙  张中太
作者单位:[1]中国科学院化工冶金研究所,北京100080 [2]清华大学材料科学与工程系,北京100084
摘    要:在313-473K温度范围内测定了一种Y2O3稳定ZrO2材料(YSZ)的交流电导率谱,进而导出了材料的直流电导率并分析了其随温度的变化关系。研究发现:在低温下材料的电导尖化能随温度的升高而增大。这一实验现象与在高温下所观察到的活化能随温度升高而降低规律截然相反。通过分析材料中氧空位的解缔及迁移机制,对YSZ材料中电导活化能随温度的变化关系作出了一个合理的解释。

关 键 词:ZrO2基固体电解质  离子电导率  电导活化能  缺陷缔合  二氧化锆  氧化钇
文章编号:1000-324X(2002)04-0811-06
收稿时间:2001-7-13
修稿时间:2001年7月13日

Activation Energy for Conduction in Y2O3-Stabilized Zirconia
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,2002,17(4):811-816.
Authors:LI Ying  GONG Jiang-Hong  XIE Yu-Sheng  TANG Zi-Long  CHEN Yun-Fa  ZHANG Zhong-Tai
Affiliation:1.InstituteofChemicalMetallurgy;ChineseAcademyofSciences;Beijing100080;China;2.DepartmentofMaterialsScienceandEngineering;TsinghuaUniversity;Beijing100084
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.
Keywords:ionic conductivity  activation energy for conduction  defect association  ZrO2-based solid electrolytes  
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