Phase transition characteristics and piezoelectric properties of compositionally optimized alkaline niobate based ceramics

被引：25

作者：

Fu, Jian ^{[1
]}

Zuo, Ruzhong ^{[1
]}

Wang, Xiaohui ^{[2
]}

Li, Longtu ^{[2
]}

机构：

[1] Hefei Univ Technol, Inst Electro Ceram & Devices, Sch Mat Sci & Engn, Hefei 230009, Peoples R China

[2] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 486卷 / 1-2期

关键词：

Ceramics; Ferroelectrics; Piezoelectricity; ELECTRICAL-PROPERTIES;

D O I：

10.1016/j.jallcom.2009.07.065

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 (Na0.52K0.48-x)(Nb0.92-xSb0.08)O-3-xLiTaO(3) ceramics with excellent dielectric and piezoelectric properties have been fabricated by ordinary sintering and their phase transition behavior, various electrical properties and temperature characteristics were investigated. The composition near x = 0.0375 exhibits a morphotropic phase boundary like behavior, and thus owns optimum electrical properties of d(33) = 395 pC/N, k(p) = 52%, epsilon(T)(33) = 2390, Q(m) = 40, N-p = 3040 Hz m and T-c = 251 degrees C. However, a strong temperature sensitivity in these compositions was observed as a result of the change of spontaneous polarization vectors or domain states, depending on the location of PPT. Compositions close to the tetragonal side exhibit much less temperature dependence, suggesting processing solutions to these obstacles. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：790 / 794

页数：5

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