Electret state in Bi4Ti3O12 ceramics

被引：4
|
作者：
Jovalekic, C. [1 ]
Zdujic, M. [2 ]
机构：
[1] Inst Multidisciplinary Res, Belgrade, Serbia
[2] Serbian Acad Arts & Sci, Inst Tech Sci, Belgrade, Serbia
来源：
CERAMICS INTERNATIONAL | 2010年 / 36卷 / 02期
关键词：
Sintering; Electrical properties; BaTiO3 and titanates; Sensors;
D O I：
10.1016/j.ceramint.2009.09.019
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 effect of thermal treatment atmosphere (argon, air or oxygen) on the electret behavior of bismuth titanate (Bi4Ti3O12) ceramics was investigated. Polycrystalline ferroelectric ceramics were prepared by reactive liquid phase sintering. Sintered samples were polarized applying an electric field, E-p = 1 MV m(-1) at 100 degrees C for 60 min. Effective surface density, sigma(eff) of free charges was determined by compensation voltage measurements. Thermally treated samples in oxygen atmosphere exhibit a significant decrease of sigma(eff) while those treated in argon exhibit an increase of sigma(eff) accompanied by the improvement in stability of electret charge. In all cases homocharge with a time independent sign was obtained. (C) 2009 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：789 / 792
页数：4
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