Superior piezoelectric performance with high operating temperature in bismuth ferrite-based ternary ceramics  

作　　者：Yunyao Huang Leiyang Zhang Ruiyi Jing Yang Yang Vladimir Shur Xiaoyong Wei Li Jin 

机构地区：[1]Electronic Materials Research Laboratory,Key Laboratory of the Ministry of Education,School of Electronic Science and Engineering,Xi’an Jiaotong University,Xi’an 710049,China [2]Faculty of Materials and Manufacturing,Key Laboratory of Advanced Functional Materials,Education Ministry of China,Beijing University of Technology,Beijing 100124,China [3]School of Natural Sciences and Mathematics,Ural Federal University,Ekaterinburg,620000,Russia

出　　处：《Journal of Materials Science & Technology》2024年第2期172-181,共10页材料科学技术（英文版）

基　　金：supported by the National Natu-ral Science Foundation of China(Grant No.52261135548);the Key Research and Development Program of Shaanxi(Program No.2022KWZ-22);the National Key Research and Development Program of China(Grant Nos.2021YFE0115000 and 2021YFB3800602);Russian Science Foundation(Project No.23-42-00116);The equipment of the Ural Center for Shared Use“Modern nanotechnology”Ural Federal University(Reg.No.2968);the Ministry of Science and Higher Education RF(Project No.075-15-2021-677)was used.

摘　　要：Due to the thermal depolarization effect,adequate piezoelectric performance with high operating temperature is regarded to be challenging to accomplish concurrently in piezoceramics for applications in specific piezoelectric devices.In this work,we synthesized(0.8−x)BiFeO_(3)-x PbTi_(3)-0.2Ba(Zr_(0.25)Ti_(0.75))O_(3)(abbreviated as BFO-x PT-BZT)ternary solid solutions with 0.15≤x≤0.30 by conventional solid-state reaction method.The MPB composition with a coexisting state of rhombohedral-tetragonal phases exhibits enhanced electromechanical properties,including Curie temperature of 380℃,large-signal equivalent piezoelectric coefficient d^(∗)_(33)of 395 pm V^(-1),small-signal piezoelectric coefficient d_(33)of 302 pC N^(-1),and electromechanical coupling factor k_(p)of 50.2%,which is comparable to commercial PZT-5A ceramics,indicating potential in high-temperature applications.Furthermore,in-situ X-ray diffraction(XRD)and piezoelectric force microscopic(PFM)techniques demonstrate that multiphase coexistence and complex nanodomains promote piezoelectric response via synergism.The x=0.24 composition exhibits the highest in-situ d_(33)of 577 pC N^(-1)and good temperature stability in 30−280℃,indicating that BZT-modified BFO-PT ceramics are promising candidates for high-temperature piezoelectric devices.

关 键 词：High-temperature piezoelectrics Morphotropic phase boundary In-situ technique Domain structure BFO 

分 类 号：TM282[一般工业技术—材料科学与工程]