The defect structure of the double layer in yttria-stabilised zirconia

被引：15

作者：

Hendriks, MGHM ^{[1
]}

ten Elshof, JE ^{[1
]}

Bouwmeester, HJM ^{[1
]}

Verweij, H ^{[1
]}

机构：

[1] Univ Twente, MESA Res Inst, Lab Inorgan Mat Sci, NL-7500 AE Enschede, Netherlands

来源：

SOLID STATE IONICS | 2002年 / 154卷

关键词：

defect structure; yttria-stabilised zirconia; differential capacity; oxygen vacancy;

D O I：

10.1016/S0167-2738(02)00484-8

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The space charge density of 2-10 mol% yttria-stabilised zirconia (YSZ) at the interface with a gold electrode was determined from differential capacity measurements at 748 - 848 K. The oxygen vacancy fraction in the space charge layer was calculated as function of bias potential, temperature and composition by fitting the data at positive bias potential to a Boltzmann-type equation. The vacancy concentration in the space charge layer increases with decreasing bias potential and reaches a temperature-dependent maximum. This behaviour can be understood under the assumption that only a fraction of the oxygen sub-lattice is available for oxygen vacancy distribution. This volume fraction increases with temperature, with an associated thermal activation energy in the range of 0.27 to 0.46 eV, depending on composition. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：467 / 472

页数：6

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