Sintering characteristics and properties of sol gel derived Sr0.8Bi2.4Ta2.0O9 ceramics

被引：27

作者：

Jain, R ^{[1
]}

Gupta, V ^{[1
]}

Sreenivas, K ^{[1
]}

机构：

[1] Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India

来源：

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 2000年 / 78卷 / 2-3期

关键词：

ferroelectric; ceramics; sol-gel; dielectric properties;

D O I：

10.1016/S0921-5107(00)00508-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Strontium bismuth tantalate (Sr0.8Bi2.4Ta2.0O9, SBT) powders have been prepared at a low processing temperature of 650 degreesC using a sol-gel method. Sintering conditions have been optimized for preparing ceramics using sol gel powders and the effect of sintering characteristics on microstructure, dielectric and ferroelectric properties have been studied. Sintering conditions at 1000 degreesC for 8 h are found to be optimum for achieving reproducible ferroelectric and dielectric properties. Longer sintering times (20 h) and a higher sintering temperature (1100 degreesC) are found to degrade the microstructure and dielectric response. Reproducible ferroelectric to paraelectric transition is observed at 380 degreesC, and a remnant polarization of 3 muC cm(-2) with a coercive field of 30 KV cm(-1) has been estimated from the ferroelectric hysteresis measurements. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：63 / 69

页数：7

共 13 条

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AMANUMA K, 1995, APPL PHYS LETT, V66, P2

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