首页|High temperature 0.63BiFeO3-0.37BaTiO3 based ceramics with large electromechanical properties by simple A-site K+ doping
High temperature 0.63BiFeO3-0.37BaTiO3 based ceramics with large electromechanical properties by simple A-site K+ doping
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NSTL
Elsevier
Designing high temperature piezoelectric ceramics with large electromechanical properties is key to the actuators application in harsh environment. BiFeO3-BaTiO3 based piezoelectric ceramics are the promising candidates due to their high electromechanical properties and high Curie temperature. Here, the simple A-site single K+ doped 0.63Bi1?xKxFeO3-0.37BaTiO3 (abbreviated as 0.63B1?xKxF-0.37BT) ceramics with positive temperature dependent electromechanical properties were fabricated via conventional solid phase method. The electromechanical properties in the 0.63B1?xKxF-0.37BT ceramics are closely related to the content of K+ doping. The excellent electromechanical properties of S= 0.26% and d33*=861 pm/V under low electric field of 30 kV/cm at 105 ℃ are achieved in the 0.63B0.9975K0.0025F-0.37BT ceramic, which is conducive to their application at high temperature. Combined with the microstructure and PFM, the optimized electromechanical properties in 0.63B0.9975K0.0025F-0.37BT ceramic are mainly due to more nanodomains switching facilitated by the large grain size and local structural heterogeneity. The site engineering of A-site single ion doping is an efficient and simple strategy for BF-BT based piezoelectric ceramics to achieving excellent electromechanical properties under low electric field at high temperature.
BiFeO3-BaTiO3 based ceramicsDomain evolutionElectromechanical propertyIon dopingTemperature dependence
Kang F.、Zhang L.、Wang Z.、Sun Q.、Zhang T.、Wang J.、Ma X.、Li T.、Zhu X.、Mao P.
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State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi'an Jiaotong University
Center for Spintronics and Quantum Systems State Key Laboratory for Mechanical Behavior of Materials Department of Materials Science and Engineering Xi'an Jiaotong University
Frontier Institute of Science and Technology State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University
National Defense Key Laboratory of Light Alloy Processing Science and Technology School of Aeronautical Manufacturing Engineering Nanchang Hangkong University
NSTL
Elsevier
