Structure and electrical properties of (Li, Sr, Sb)-modified K0.5Na0.5NbO3 lead-free piezoelectric ceramics

被引：29

作者：

Hao, Jigong ^{[1
]}

Chu, Ruiqing ^{[1
,3
]}

Xu, Zhijun ^{[1
,3
]}

Zang, Guozhong ^{[1
,3
]}

Li, Guorong ^{[2
]}

机构：

[1] Liaocheng Univ, Coll Mat Sci & Engn, Liaocheng 252059, Peoples R China

[2] Chinese Acad Sci, State Key Lab High Performance Ceram & Superfinem, Shanghai Inst Ceram, Shanghai 200050, Peoples R China

[3] Liaocheng Univ, Renewable Energy & Environm Mat Res Ctr, Liaocheng, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 479卷 / 1-2期

基金：

中国国家自然科学基金; 国家高技术研究发展计划(863计划);

关键词：

Lead-free; Piezoelectric; Dielectric; Phase transition; Morphotropic phase boundary; FERROELECTRIC PROPERTIES; AG; LI;

D O I：

10.1016/j.jallcom.2008.12.069

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Lead-free piezoelectric ceramics (K0.5Na0.5)(0.96-x)LixSr0.02Nb0.98Sb0.02O3 (abbreviated as KNSNS-Li-x, x = 0-0.07) were prepared by conventional solid state reaction method. The compositional dependence of phase structure and electrical properties of the ceramics was studied. X-ray diffraction analysis showed that a morphotropic phase boundary (MPB) between orthorhombic and tetragonal phases existed in the composition range of 0.04 <= x <= 0.05, near which the electrical properties were enhanced. The ceramics of x = 0.04 exhibited good properties (d(33) = 142 pC/N, k(P) = 38.2%, P-r = 20.4 mu C/cm(,)(2) T-C = 353 degrees C, epsilon(r) = 774, tan delta = 3.2%) owning to the formation of MPB. These results showed that the KNSNS-Li-x ceramic was a promising lead-free piezoelectric material. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：376 / 380

页数：5

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