Enhanced piezoelectric properties and depolarization temperature in textured(Bi_(0.5)Na_(0.5))TiO_(3)-based ceramics via homoepitaxial templated grain growth  

作　　者：Yaqing Ma Linjing Liu Hang Xie Zerui Zhang Qiangwei Kou Rui Lv Bin Yang Yunfei Chang Fei Li 

机构地区：[1]Functional Materials and Acousto-Optic Instruments Institute,School of Instrumentation Science and Engineering,Harbin Institute of Technology,Harbin 150080,China [2]Electronic Materials Research Laboratory(Key Lab of Education Ministry),State Key Laboratory for Mechanical Behavior of Materials and School of Electronic Science and Engineering,Xi’an Jiaotong University,Xi’an 710049,China

出　　处：《Journal of Materials Science & Technology》2024年第9期91-98,共8页材料科学技术（英文版）

基　　金：financial support from the National Natural Science Foundation of China(Nos.52072092 and 51922083);the Natural Science Foundation of Heilongjiang Province(No.YQ2019E026);the Fundamental Research Funds for the Central Universities(No.HIT.OCEF.2021018).

摘　　要：Enhanced piezoelectric response was usually achieved in(Bi_(0.5) Na_(0.5))TiO_(3)(BNT)-based ceramics with sacrifice of depolarization temperature T_(d),seriously limiting their usage range in electromechanical applications.In this work,we propose to explore piezoelectric anisotropy and domain engineering in composition&microstructure-controlled textured ceramics to resolve this issue.[001]c-textured 0.94(Bi_(0.5) Na_(0.5))TiO_(3)–0.06BaTiO_(3)(0.94BNT-0.06BT)ceramics with Lotgering factor F_(001)-91% were fabricated through homoepitaxial templated grain growth(TGG)via using 0.94BNT-0.06BT microplatelet templates.The textured samples exhibited more ordered domains with facilitated domain switching behavior,being consistent with saturated high polarization achieved at lower electric fields.Increasing F_(001) to above 60%enables rapid enhancement of piezoelectric response.Notably,compared to non-textured counterpart,the maximally textured ceramics exhibited-236%enhanced piezoelectric coefficient(d_(33)-302 pC/N)and-280% enhanced piezoelectric voltage coefficient(g_(33)-49.8×10^(−3)Vm/N),together with slightly increased depolarization temperature(T_(d)-106℃).Moreover,those values are approaching or even higher than the single-crystal values.This work not only provides important guidelines for design and synthesis of novel textured ceramics with improved comprehensive electrical properties,but also can expand application fields of BNT-based ceramics.

关 键 词：Lead-free ceramics Templated grain growth Piezoelectric coefficient Depolarization temperature Domain dynamics 

分 类 号：TG148[一般工业技术—材料科学与工程]