Doping mechanisms and electrical properties of La-doped BaTiO3 ceramics

被引：132

作者：

Morrison, FD ^{[1
]}

Sinclair, DC ^{[1
]}

West, AR ^{[1
]}

机构：

[1] Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, England

来源：

INTERNATIONAL JOURNAL OF INORGANIC MATERIALS | 2001年 / 3卷 / 08期

关键词：

ferroelectric oxides; electroceramics; doping mechanisms; phase transitions;

D O I：

10.1016/S1466-6049(01)00128-3

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The electrical properties of Ba1-xLaxTi1-x/4O3 ceramics where x less than or equal to 0.20 were investigated by impedance spectroscopy after heat treatment in O-2, Ar and air at 1350 degreesC, Samples heated in O-2, were electrically insulating with very high maximum permittivities, similar to 25,000 at x=0.06 and exhibited significant 'relaxor-type' behaviour at x=0.10. Samples heated in Ar were semiconducting for all x whereas air heated samples were electrically inhomogeneous. Semiconductivity in these materials is attributed to oxygen loss as opposed to La-donor doping. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：1205 / 1210

页数：6

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