Effects of MnO doping on properties of 0.97K0.5Na0.5NbO3-0.03(Bi0.5K0.5)TiO3 piezoelectric ceramics

被引：62

作者：

Jiang, X. P. ^{[1
]}

Chen, Y. ^{[1
,2
,3
]}

Lam, K. H. ^{[2
,3
]}

Choy, S. H. ^{[2
,3
]}

Wang, J. ^{[2
,3
]}

机构：

[1] Jingdezhen Ceram Inst, Dept Mat Sci & Engn, Jingdezhen 333001, Peoples R China

[2] Hong Kong Polytech Univ, Dept Appl Phys, Hong Kong, Hong Kong, Peoples R China

[3] Hong Kong Polytech Univ, Mat Res Ctr, Hong Kong, Hong Kong, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 506卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Lead-free piezoelectric ceramics; MnO doping; Electric properties; PHASE TRANSITIONAL BEHAVIOR; LEAD-FREE CERAMICS; ELECTRICAL-PROPERTIES; FERROELECTRIC PROPERTIES; DIELECTRIC-PROPERTIES; FREE PIEZOCERAMICS; MICROSTRUCTURE;

D O I：

10.1016/j.jallcom.2010.06.200

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：

MnO-doped 0.97K(0.5)Na(0.5)NbO(3)-0.03(Bi0.5K0.5)TiO3 lead-free piezoelectric ceramics have been fabricated by solid state reaction. The MnO-doped KNN-BKT samples show tetragonal perovskite structure and the grain size increases obviously. With an addition of the optimal doping of MnO, all the electrical properties of the samples, especially the piezoelectric and pyroelectric performance, have been enhanced significantly. The KNN-BKT ceramics, with 0.8 wt% MnO doping, exhibits optimal electrical properties: d(33) =221 pC/N, k(p) =44.7%, tg delta = 1.4%, epsilon(r) = 1229, Q(m) = 143, rho = 4.464 g/cm(3) and p = 221 mu C/m(2) K. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：323 / 326

页数：4

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