Sintering and electrical properties of La-modified (Na0.52K0.45Li0.03)1-3xLax(Nb0.88Sb0.09Ta0.03)O3 lead-free ceramics

被引：13

作者：

Du, Juan ^{[1
]}

Xu, Zhijun ^{[1
]}

Deng, Baojun ^{[2
]}

Chu, Ruiqing ^{[1
]}

Yi, Xiujie ^{[1
]}

Zheng, Limei ^{[3
]}

Li, Yuchao ^{[1
]}

机构：

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

[2] Jinan Environm Monitoring Ctr, Jinan 250014, Peoples R China

[3] Harbin Inst Technol, Condensed Matter Sci & Technol Inst, Harbin 150001, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2014年 / 40卷 / 03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：

Sintering; X-ray methods; Piezoelectric properties; Lead-free; Ceramics; FREE PIEZOELECTRIC CERAMICS; TEMPERATURE STABILITY; PHASE-TRANSITION; CUO;

D O I：

10.1016/j.ceramint.2013.08.098

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

(Na0.52K0.45Li0.03)(1-3x)La-x(Nb0.88Sb0.09Ta0.03)O-3 (NKLLxNST) lead-free ceramics were prepared by normal sintering and their dielectric and piezoelectric properties were investigated. The X-ray methods indicate that the NKLLxNST ceramics with x <= 0.003 present a pure perovskite phase at room temperature. The bulk density of NKLLxNST ceramics increases with proper amount of La2O3 contents, and reaches its highest value of 4.544 g/cm(3) with the addition of 0.3 mol% La2O3. At x=0.003, remnant polarization P-r, piezoelectric constant d(33) and planar mode electromechanical coupling factor k(p) of NKLLxNST ceramics reach the highest values of 37.80 mu C/cm(2), 346 pC/N and 40%, respectively, exhibiting excellent "soft" piezoelectric characteristics, demonstrating a tremendous potential of the compositions studied for device applications. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：4319 / 4322

页数：4

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