Excellent temperature stability with giant electrostrain in Bi0.5Na0.5TiO3-based ceramics

被引：33
作者：
Wu, Yichen [1 ,3 ]
Wang, Genshui [1 ,2 ,4 ]
Jiao, Zheng [3 ]
Dong, Xianlin [1 ,3 ,4 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Inorgan Funct Mat & Devices, 1295 Dingxi Rd, Shanghai 200050, Peoples R China
[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
[3] Shanghai Univ, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China
[4] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, 1295 Dingxi Rd, Shanghai 200050, Peoples R China
来源：
SCRIPTA MATERIALIA | 2020年 / 179卷 / 179期
基金：
中国国家自然科学基金; 上海市自然科学基金;
关键词：
BNT-based; Electrostrain; Thermally stability; LEAD-FREE PIEZOCERAMICS; ENERGY-STORAGE; THERMAL-STABILITY; STRAIN; TRANSITION; DENSITY; PERFORMANCES; PEROVSKITE; SUPERIOR;
D O I：
10.1016/j.scriptamat.2019.12.022
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this work, we report a giant strain (0.42%) in lead-free ceramics of (1-x) (0.79Bi(0.5)Na(0.5)TiO(3)-0.20 Bi0.5K0.5TiO3-0.01NaNbO(3))-xSrTiO(3) with x=0.03. Most importantly, ultra-high temperature stability was simultaneously achieved under this giant strain with the variation less than 10% in the range of 20 degrees C and 140 degrees C. Systematic temperature dependent Raman spectra measurements and Ginzburg-Landau-Devonshire thermodynamic theory analysis revealed that the intrinsic lattice strain and electric field induced relaxor-ferroelectric phase transition provide reverse strain response with the increase of temperature, jointly conducive to the ultra-high temperature stability of strain property. These materials are extremely competitive in practical application of actuators. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：70 / 74
页数：5
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