Enhanced piezoelectricity in (K, Na) NbO3-based ceramics by optimizing composition and texture process

被引：16
|
作者：
Liu, Baihui [1 ]
Li, Peng [1 ]
Zhang, Yang [1 ]
Shen, Bo [1 ]
Zhai, Jiwei [1 ]
机构：
[1] Tongji Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Adv Civil Engn Mat, Shanghai 201804, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 695卷
基金：
中国国家自然科学基金;
关键词：
KNN-Based textured ceramics; BZ modification; Multiphase coexistence; Electrical properties; POTASSIUM-SODIUM NIOBATE; LEAD-FREE CERAMICS; ELECTRICAL-PROPERTIES; PHASE BOUNDARIES; GRAIN-GROWTH; SYSTEM;
D O I：
10.1016/j.jallcom.2016.11.069
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：
In this study, <001>-textured (1-x)(K0.5Na0.5)(0.95)Li0.05Nb0.93Sb0.07O3-xBaZrO(3) [abbreviated as (1-x) KNLNS-xBZ, x = 0.01, 0.02, 0.04, 0.06, 0.08] lead-free ceramics are prepared by template grain growth (TGG) method using NaNbO3 templates. The effects of BZ content on the phase structure, microstructure, as well as electrical properties of ceramics are investigated. Large piezoelectric constant d(33) (similar to 234 pC/N) and planar electromechanical coupling factor k(p) (similar to 38.42%) are obtained in the ceramics with x = 0.02, and high field-induced strain (d(33)(*) similar to 403.5 pm/V) is also achieved in the rhombohedral-orthorhombic-tetragonal phase coexistent area due to multiphase coexistence. These results show that the introduction of BaZrO3 is a very effective way to improve the electrical properties of textured (K0.5Na0.5)(0.95)Li0.05Nb0.93Sb0.07O3 lead-free piezoelectric ceramics. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：2207 / 2214
页数：8
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