Ultra-slim electrostrains with superior temperature-stability in leadfree sodium niobate-based ferroelectric perovskite  

作　　者：Ruiyi Jing Qingyuan Hu Leiyang Zhang Yuan Sun Jiagang Wu D.O.Alikin V.Ya Shur Xiaoyong Wei Hongliang Du Yunfei Chang Li Jin 

机构地区：[1]Electronic Materials Research Laboratory,Key Laboratory of the Ministry of Education&International Center for Dielectric Research,School of Electronic Science and Engineering,Xi'an Jiaotong University,Xi'an,710049,China [2]Functional Materials and Acousto-Optic Instruments Institute,School of Instrumentation Science and Engineering,Harbin Institute of Technology,Harbin,150080,China [3]Department of Materials Science,Sichuan University,Chengdu,610065,China [4]School of Natural Sciences and Mathematics,Ural Federal University,Ekaterinburg,620000,Russia [5]Multifunctional Electronic Ceramics Laboratory,College of Engineering,Xi'an International University,Xi'an,710077,China

出　　处：《Journal of Materiomics》2022年第6期1230-1238,共9页无机材料学学报（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.52172127 and 52072092);the International Cooperation Project of Shaanxi Province(Grant No.2022KWZ-22);the National Key Research and Development Program of China(Grant Nos.2021YFE0115000 and SQ2021YFB380003202);the Youth Innovation Team of Shaanxi Universities and Scientific Research Program Funded by Shaanxi Provincial Education Department(Grant No.21JP104)。

摘　　要：Large electrostrains with high temperature stability and low hysteresis are essential for applications in high-precision actuator devices.However,achieving simultaneously all three of the aforementioned features in ferroelectric ceramics remains a considerable challenge.In this work,we firstly report a high unipolar electrostrain(0.12%at 60 kV/cm)in(1ex)NaNbO_(3)-x[(Ba0.85Ca0.15)(Zr_(0.1)Ti_(0.9))O_(3)](NN-xBCZT)ferroelectric polycrystalline ceramics with excellent thermal stability(variation less than 10%in the temperature range of 30-160℃)and ultra-low hysteresis(<6%).Secondly,the high-field electrostrain response is dominated by the intrinsic electrostrictive effect,which may account for more than 80%of the electrostrain.Furthermore,due to the thermal stability of the polarization in the pure tetragonal phase,the large electrostrain demonstrates extraordinarily high stability from room temperature to 140℃.Finally,in-situ piezoelectric force microscopy reveals ultra-highly stable domain structures,which also guarantee the thermal stability of the electrostrain in(NN-xBCZT ferroelectrics ceramics.This study not only clarifies the origin of thermally stable electrostrain in NN-xBCZT ferroelectric perovskite in terms of electrostrictive effect,but also provides ideas for developing applicable ferroelectric ceramic materials used in actuator devices with excellent thermal stability.

关 键 词：Electrostrain ELECTROSTRICTION NaNbO_(3) POLARIZATION 

分 类 号：TQ17[化学工程—硅酸盐工业]