Y2O3稳定ZrO2材料的电导活化能

无机材料学报

Y₂O₃稳定ZrO₂材料的电导活化能

李英¹; 谢裕生¹; 陈运法¹; 龚江宏²; 唐子龙²; 张中太²

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

收稿日期:2001-07-13 修回日期:2001-08-28 出版日期:2002-07-20 网络出版日期:2002-07-20

Activation Energy for Conduction in Y₂O₃-Stabilized Zirconia

LI Ying¹; GONG Jiang-Hong²; XIE Yu-Sheng¹; TANG Zi-Long²; CHEN Yun-Fa¹; ZHANG Zhong-Tai²

1. Institute of Chemical Metallurgy; Chinese Academy of Sciences; Beijing 100080; China; 2. Department of Materials Science and Engineering; Tsinghua University; Beijing 100084

Received:2001-07-13 Revised:2001-08-28 Published:2002-07-20 Online:2002-07-20

摘要/Abstract

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活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的规律截然相反.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: 离子电导率, 电导活化能, 缺陷缔合, ZrO₂基固体电解质

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

中图分类号:

O482
TM28

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.

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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Y₂O₃稳定ZrO₂材料的电导活化能

Activation Energy for Conduction in Y₂O₃-Stabilized Zirconia

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