Abstract
Due to the thermal depolarization effect,adequate piezoelectric performance with high operating tem-perature is regarded to be challenging to accomplish concurrently in piezoceramics for applications in specific piezoelectric devices.In this work,we synthesized(0.8-x)BiFeO3-xPbTiO3-0.2Ba(Zr025Ti0.75)O3(abbreviated as BFO-xPT-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 ex-hibits enhanced electromechanical properties,including Curie temperature of 380 ℃,large-signal equiv-alent piezoelectric coefficient d*33 of 395 pm V-1,small-signal piezoelectric coefficient d33 of 302 pC N-1,and electromechanical coupling factor kp 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 high-est in-situ d33 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.
基金项目
国家自然科学基金(52261135548)
Key Research and Development Program of Shaanxi(2022KWZ-22)
国家重点研发计划(2021YFE0115000)
国家重点研发计划(2021YFB3800602)
Russian Science Foundation(23-42-00116)
equipment of the Ural Center for Shared Use"Modern nanotechnology"Ural Federal University(Reg.2968)
Ministry of Science and Higher Education RF(075-15-2021-677)
International Center for Dielectric Research(ICDR),Xi'an Jiaotong University,Xi'an,China()
NETL
NSTL
万方数据