Grain boundary defect chemistry of acceptor-doped titanates: High field effects

被引：48

作者：

Vollmann, M ^{[1
]}

Waser, R ^{[1
]}

机构：

[1] Rhein Westfal TH Aachen, Inst Werkstoffe Elektrotech, D-52056 Aachen, Germany

来源：

JOURNAL OF ELECTROCERAMICS | 1997年 / 1卷 / 01期

关键词：

grain boundaries; space charge; impedance spectroscopy; acceptor; titanate;

D O I：

10.1023/A:1009998331688

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：

The field enhanced average conductivity in grain boundary space charge depletion layers in acceptor-doped SrTiO3 ceramics was investigated by impedance analysis in the time domain. The dependence of the grain boundary conductivity on the acceptor concentration, the temperature and the field dependence are discussed and interpreted in terms of a Schottky diffusion model combined with the influence of accumulated oxygen vacancies at the GB interface.

引用

页码：51 / 64

页数：14

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