Lead-free electrostrictive bismuth perovskite ceramics with thermally stable field-induced strains

被引：38

作者：

Vu Diem Ngoc Tran ^{[1
]}

Han, Hyoung-Su ^{[1
]}

Yoon, Chang-Ho ^{[1
]}

Lee, Jae-Shin ^{[1
]}

Jo, Wook ^{[2
]}

Roedel, Juergen ^{[2
]}

机构：

[1] Univ Ulsan, Sch Mat Sci & Engn, Ulsan 680749, South Korea

[2] Tech Univ Darmstadt, Inst Mat Sci, D-64287 Darmstadt, Germany

来源：

MATERIALS LETTERS | 2011年 / 65卷 / 17-18期

关键词：

Piezoelectric materials; Perovskites; Ferroelectrics; Ceramics; FREE PIEZOELECTRIC CERAMICS; FREE PIEZOCERAMICS; TEMPERATURE;

D O I：

10.1016/j.matlet.2011.05.059

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electric field-induced strain (EFIS) properties of Bi-1/2(Na0.82K0.18)(1/2)TiO3 (BNKT) ceramics modified with Sr (K1/4Nb3/4)O-3 (SKN) have been investigated as functions of composition and temperature. BNKT ceramics near a phase boundary revealed the coexistence of ferroelectric rhombohedral and tetragonal phases, resulting in a typical ferroclectric butterfly-shaped bipolar S-E loop at room temperature, whose normalized strain (S-max/E-max.) showed a significant temperature coefficient of 0.38 pm/V/K. However, 5 mol% SKN-modified BNKT ceramics revealed a typical electrostrictive behaviour with a thermally stable electrostrictive coefficient, Q(33) = 0.021 m(4)/C-2, which is almost comparable to that of Pb(Mg1/3Nb2/3)O-3 (PMN) ceramics that have been dominantly used as Pb-based electrostrictive materials over the last decades. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：2607 / 2609

页数：3

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