首页|Enhanced electric-field induced strain in Eu3+doped 0.67BiFeO3-0.33BaTiO3 lead-free piezoelectric ceramics

Enhanced electric-field induced strain in Eu3+doped 0.67BiFeO3-0.33BaTiO3 lead-free piezoelectric ceramics

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Lead-free ferroelectric ceramics,0.67Bi1-xEuxFeO3-0.33BaTiO3(BF-BT-xEu,x=0-0.02),were prepared via a solid-state reaction.The effect of Eu3+doping on the microstructure,dielectric properties,ferro-electric properties,and electric-field-induced strain was investigated.The X-ray diffraction(XRD)results indicate the presence of a mixed phase of tetragonal and rhombohedral at the morphotropic phase boundary(MPB).Doping with an appropriate amount of Eu3+reduces the Fe2+content and decreases the leakage current in the binary system.A converse piezoelectric coefficient(d33*)of 392 pm/V is obtained at BF-BT-0.003Eu under an electric field of 60 kV/cm at room temperature,which has a Curie temperature(Tc)of 414 ℃.The unipolar strain and d33*of BF-BT-0.003Eu ceramics increase to 0.438％and 730 pm/V at 125 ℃.The field-induced strain response of the BF-BT-0.003Eu ceramics is greater than that of 0.67BF-0.33BT,mainly due to its optimal grain size,reduction of leakage current,and coexistence of ferroelectric-relaxation phases.BF-BT-0.003Eu ceramic is a lead-free candidate for high-temperature actuator applications.

FerroelectricField-induced strainCeramicsLead-freeRare earths

Wei Li、Tongxiang Liang、Xiang He、Vyunov Oleg、Dongfang Pang、Shan Wu

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College of Rare Earths,Jiangxi University of Science and Technology,Ganzhou,341000,China

Key Laboratory of High Performance Ceramics and Ultrastructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai,201800,China

National Natural Science Foundation of China Youth ProjectYouth Project of the Natural Science Foundation of Jiangxi Provincial Science and TechnologyProgram of Qingjiang Excellent Young Talents of Jiangxi University of Science and Technology

5170231720212BAB214019JXUSTQJYX2020004

2024

10.1016/j.jre.2023.08.001

稀土学报(英文版)
中国稀土学会

稀土学报(英文版)

CSTPCDEI
影响因子：1.3
ISSN：1002-0721
年,卷(期)：2024.42(9)
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