STUDY OF OXYGEN VACANCIES IN CERAMICS BY PERTURBED ANGULAR-CORRELATION SPECTROSCOPY

被引：14

作者：

SU, HT

WANG, RP

FUCHS, H

GARDNER, JA

EVENSON, WE

SOMMERS, JA

机构：

[1] BRIGHAM YOUNG UNIV,DEPT PHYS,PROVO,UT 84602

[2] TELEDYNE WAH CHANG INC,ALBANY,OR 97321

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1990年 / 73卷 / 11期

关键词：

ceria; oxygen; traps; vacancies; zirconia;

D O I：

10.1111/j.1151-2916.1990.tb06440.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Perturbed angular correlation (PAC) measurements in tetragonal and cubic zirconia and in ceria are described. A physically reasonable and self‐consistent interpretation of these data implies that oxygen vacancies are trapped at a second‐neighbor position by Cd in tetragonal zirconia and by In in ceria. For Cd in tetragonal zirconia, the vacancy trap energy is found to be 0.44 eV, and the energy barrier between adjacent trap sites is approximately 0.8 eV. The activation energy of an oxygen vacancy hopping between trap sites around 111Cd in ceria is found to be 0.55 eV. The activation energy for oxygen vacancy hopping in cubic zirconia, as detected by 181Ta PAC, is about 1.0 eV and independent of the Y concentration. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：3215 / 3219

页数：5

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