MICROSTRUCTURE AND ELECTRICAL-PROPERTIES OF CHEMICALLY PREPARED NB2O5-DOPED SRTIO3 CERAMICS

被引：20

作者：

RAYMOND, MV ^{[1
]}

AMARAKOON, VRW ^{[1
]}

机构：

[1] ALFRED UNIV,NEW YORK STATE COLL CERAM,ALFRED,NY 14802

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1990年 / 73卷 / 05期

关键词：

electrical properties; microstructure; nitrates; strontium; titanates;

D O I：

10.1111/j.1151-2916.1990.tb05196.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：

Chemically homogeneous SrTiO3 powders of submicrometer size were obtained by alcohol dehydration and subsequent calcination of citrate/format solutions. Nb2O5‐doped SrTiO3 was prepared with various Sr:Ti ratios resulting in an anomalous increase in the dielectric constant (K’up to ∼8000) for donor‐doped SrO‐excess SrTiO3. No semiconducting behavior was observed for donor‐doped TiO2‐excess SrTiO3 when fired in air. Therefore, a “brick‐wall” type of microstructure was formed as a result of the excess SrO, giving rise to anomalously high dielectric constants. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：1308 / 1311

页数：4

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