Giant strain in Nb-doped Bi0.5(Na0.82K0.18)0.5TiO3 lead-free electromechanical ceramics

被引：190

作者：

Pham, Ky-Nam ^{[1
]}

Hussain, Ali ^{[1
]}

Ahn, Chang Won ^{[2
]}

Kim, Ill Won ^{[2
]}

Jeong, Soon Jong ^{[3
]}

Lee, Jae-Shin ^{[1
]}

机构：

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

[2] Univ Ulsan, Dept Phys, Ulsan 680749, South Korea

[3] Korea Electrotechnol Res Inst, Adv Mat Div, Chang Won 641120, South Korea

来源：

MATERIALS LETTERS | 2010年 / 64卷 / 20期

关键词：

Piezoelectric materials; Perovskites; Ferroelectrics; Ceramics; PIEZOELECTRIC PROPERTIES;

D O I：

10.1016/j.matlet.2010.07.048

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of Nb substitution on the crystal structure, ferroelectric, and electric field induced strain properties of Bi-0.5(Na82K0.18)(0.5)TiO3 (BNKT) ceramics has been investigated. The coexistence of rhombohedral and tetragonal phases was found in undoped BNKT ceramics, however, Nb doping induced a phase transition to a pseudocubic phase with high electrostriction coefficients. When 3 mol% Nb was substituted on Ti ions, the electric field induced strain was markedly enhanced up to S-max/E-max=641 pm/V, which is higher than those previously reported on non-textured lead-free electromechanical ceramics. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：2219 / 2222

页数：4

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