Influence of isovalent and aliovalent substitutions at Ti site on bismuth sodium titanate-based compositions on piezoelectric properties

被引：9

作者：

Danwittayakul, S. ^{[1
]}

Vaneesorn, N. ^{[1
]}

Jinawath, S. ^{[2
]}

Thanaboonsombut, A. ^{[1
]}

机构：

[1] Natl Sci & Technol Dev Agcy, Natl Met & Mat Technol Ctr, Pathum Thani 12120, Thailand

[2] Chulalongkorn Univ, Fac Sci, Dept Ceram Technol, Bangkok 10330, Thailand

来源：

CERAMICS INTERNATIONAL | 2008年 / 34卷 / 04期

关键词：

ferroelectric properties; piezoelectric properties; lead-free piezoelectrics; BNT;

D O I：

10.1016/j.ceramint.2007.09.097

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 isovalent and aliovalent substitutions in Bi0.5Na0.485La0.005TiO3 (BNLT) compounds were studied within the additive ranges of 0-2.5at%. The Zr4+, Nb5+ and Fe3+ ions were selected as the substituents. The modified BNLT compounds were prepared by conventionally mixed-oxide method. The calcination and sintering were performed at the temperatures of 750-850 degrees C and 1050-1150 degrees C, respectively. An increase in the substituents contents affected the physical and piezoelectric properties. The BNLT compositions with the addition of 1 at% Zr4+, Nb5+ and Fe3+ ions exhibited high relative permittivities (epsilon(r)) at 730, 735 and 660, respectively. The modified-BNLT with an addition of 1.0 at% Fe provided a piezoelectric coefficient (d(33)) of 155 pC/N, Curie temperature (T-c) of 320 degrees C and electromechanical coupling factors in planar (k(p)) and thickness (k(t)) modes of 15 and 45%, respectively. (C) 2007 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：765 / 768

页数：4

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