EVOLUTION OF MICROSTRUCTURE AND V-SHAPED POSITIVE TEMPERATURE-COEFFICIENT OF RESISTIVITY OF (PB0.6SR0.4)TIO3 MATERIALS

被引：39

作者：

LEE, CK ^{[1
]}

LIN, IN ^{[1
]}

HU, CT ^{[1
]}

机构：

[1] NATL TSING HUA UNIV,CTR MAT SCI,HSINCHU 30043,TAIWAN

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1994年 / 77卷 / 05期

关键词：

D O I：

10.1111/j.1151-2916.1994.tb05412.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：

The effects of various liquid-phase sintering aids on (Pb0.6Sr0.4)TiO3 ceramics have been investigated. The relationships between electrical properties and microstructures have been scrutinized. It has been found that, among the sintering aids studied, only SiO2 exhibits a significant effect on the grain growth of (Pb0.6Sr0.4)TiO3. The optimum firing profiles for sound microstructure and good electrical properties of (Pb0.6Sr0.4)TiO3 + 5.0 mol% SiO2 have been established. The V-shaped electrical behavior is prominent, and a PTCR jump of about 10(2.9) is observed. The formation of cation vacancies may increase the resistivity of the over-fired specimens. Various milling methods to pulverize the calcined powder and the optimum amount of packing protection powder during sintering are also discussed.

引用

页码：1340 / 1344

页数：5

共 21 条

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