Large electromechanical strain at high temperatures of novel <001> textured BiFeGaO3-BaTiO3 based ceramics

作     者：Jiangguli Peng Wenbin Liu Jiangtao Zeng Liaoying Zheng Guorong Li Anthony Rousseau Alain Gibaud Abdelhadi Kassiba Jiangguli Peng;Wenbin Liu;Jiangtao Zeng;Liaoying Zheng;Guorong Li;Anthony Rousseau;Alain Gibaud;Abdelhadi Kassiba

作者机构：Key Laboratory of Inorganic Functional Material and DeviceShanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China Institut des Molécules et Matériaux du Mans(IMMM)CNRS UMR 6283Facultédes SciencesUniversitédu MaineAvenue O.Messiaen72085 Le MansCedex 09France Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2020年第47卷第13期

页      面：92-99页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financially supported by the National Key R&D Program of China(Nos.2016YFB0402701 and 2016YFA0201103) the National Basic Research Program of China(No.2015CB654605) the National Natural Science Foundation of China(Nos.51831010 and 51672293) the Instrument Developing Project of Chinese Academy of Sciences(No.ZDKYYQ20180004) 

主　　题：Textured ceramics Strain hysteresis Reactive templated grain growth Dielectric responses 

摘      要：BiFeGaO3-BaTiO3(BFG-BT)based ceramics with a large piezoelectric coefficient are potential high performance lead-free piezoelectric *** this work,textured and random BFG-BT ceramics were realized by the solid state reaction method with and without BaTiO3(BT)*** ceramics were obtained by a reactive templated grain growth(RTGG)method leading to a high-temperature electromechanical strain of S=0.27%at 40 kV/cm and to an effective piezoelectric coefficient(d33*)up to 685 pm/V at 180℃.The easy movement of oriented domains enhanced the electromechanical strain under an applied electric field in textured sample(Lotgering factor f=66.3%).Structural investigations reveal that the proportion and degree of distortion of BFG-BT rhombohedral phase(R3c)reached its maximum in textured ceramics,resulting in large ferrodistortive displacements under electric *** addition,the dense nanodomains with low domain wall energies,inferred from the high-resolution transmission electron microscope(HR-TEM)observations,contribute to the extra displacement of the textured sample under an applied electric *** textured ceramics,the remnant polarization was stable(about 17μC/cm2)from room temperature to 180℃,contributing to the stable ferroelectric property at high *** the introduction of BT templates,high-density nanodomains were formed and the Burns temperature was enhanced in textured *** electromechanical strain,polarization and dielectric behavior were correlated to the textured or random forms of the BFG-BT based ceramics.