Enhanced electrical properties of lead-free BNLT-BZT ceramics by thermal treatment technique

被引：6
作者：
Kantha, Puripat [1 ]
Pisitpipathsin, Nuttapon [1 ]
Pengpat, Kamonpan [1 ]
机构：
[1] Chiang Mai Univ, Fac Sci, Dept Phys & Mat Sci, Chiang Mai 50200, Thailand
来源：
CERAMICS INTERNATIONAL | 2013年 / 39卷
关键词：
Dielectric properties; Ferroelectric properties; Piezoelectric properties; Perovskites; FREE PIEZOELECTRIC CERAMICS; DIELECTRIC-PROPERTIES; SYSTEM;
D O I：
10.1016/j.ceramint.2012.10.035
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：
Electrical properties of lead-free solid solution ceramics from the Bi0.4871Na0.4871La0.0172TiO3 (BNLT) and BaZr0.05Ti0.95O3 (BZT) system have been improved by a thermal treatment technique. A modified two step mixed-oxide method was employed for the preparation of the (1-x)BNLT-xBZT ceramics, where x=0.06, 0.09, 0.12 and 0.20. After sintering at 1125 degrees C for 4 h, the BNLT-BZT ceramics were annealed at 825, 925 and 1025 degrees C. The annealing treatment caused an increase in dielectric constant of BNLT-BZT ceramics with x <= 0.09 mol% and with x higher than 0.09 mol% the dielectric value dropped considerably. The ferroelectric properties of all annealed ceramic samples tend to decrease with increasing annealing temperature as confirmed by the slimmer P-E loops. The piezoelectric coefficient (d(33)) increased with annealing temperatures and a maximum value of similar to 170 pC/N was obtained from the ceramic samples annealed at 1025 degrees C with x=0.02. (C) 2012 Elsevier Ltd and lechna Group S.r.l. All rights reserved.
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页码：S59 / S63
页数：5
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