Enhancement of the ionic conductivity of mixed calcia/yttria stabilized zirconia

被引：25

作者：

Gong, JH ^{[1
]}

Li, Y ^{[1
]}

Tang, ZL ^{[1
]}

Zhang, ZT ^{[1
]}

机构：

[1] Tsing Hua Univ, Dept Mat Sci & Engn, Beijing 100084, Peoples R China

来源：

MATERIALS LETTERS | 2000年 / 46卷 / 2-3期

基金：

中国国家自然科学基金;

关键词：

oxides; calcia; CaO; yttria; Y2O3; zirconia; ZnO2; ionic conductivity; zirconia-based electrolyte; defect association;

D O I：

10.1016/S0167-577X(00)00152-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A ZrO2-based electrolyte, stabilized with 6 mol% CaO and 4 mol% Y2O3 was synthesized. This electrolyte consists of a single phase fluorite-type solid solution with cubic symmetry and exhibits a uniform microstructure. In the temperature range 1273-1673 K, the direct current (DC) conductivity of this electrolyte is higher than that of 12 mol% CaO-stabilized ZrO2 and comparable to that of 8 mol% Y2O3-stabilized ZrO2, prepared with the same processing procedure. It was suggested, by comparing the electrical behaviors of both binary systems ZrO2-CaO and ZrO2-Y2O3, that the enhancement of the ionic conductivity of mixed CaO/Y2O3-stabilized ZrO2 at high temperature can be attributed to the increase in the concentration of the oxygen vacancies with weaker association energies. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：115 / 119

页数：5

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