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Journal of Advanced Ceramics

Article Title

Evolution of electromechanical properties in Fe-doped (Pb,Sr)(Zr,Ti)O3 piezoceramics

Authors

Chuan CHEN, Joint Laboratory of Electric Power Intelligent Sensing Technology and Application, Department of Sensing Technology for Electric Power, Global Energy Interconnection Research Institute Co., Ltd., Future Science Park, Beijing 102209, China
Yan WANG, Joint Laboratory of Electric Power Intelligent Sensing Technology and Application, Department of Sensing Technology for Electric Power, Global Energy Interconnection Research Institute Co., Ltd., Future Science Park, Beijing 102209, China
Zong-Yue LI, China Aerospace Science and Industry Corporation, Beijing 100048, China
Chun LIU, Naqu Branch of Tibet Electric Limited Company, Naqu 852000, China
Wen GONG, State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;Center of Advanced Ceramic Materials and Devices, Yangtze Delta Region Institute of Tsinghua University, Zhejiang 314006, China
Qing TAN, Beijing Advanced Innovation Center for Materials Genome Engineering, State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
Bing HAN, Department of Orthodontics & National Engineering Laboratory for Digital and Material Technology, Peking University School and Hospital of Stomatology, Beijing 100081, China
Fang-Zhou YAO, Center of Advanced Ceramic Materials and Devices, Yangtze Delta Region Institute of Tsinghua University, Zhejiang 314006, China;State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China;Foshan Institute for New Materials, Foshan 528200, China
Ke WANG, State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

Keywords

lead–zirconate–titanate (PZT), piezoelectric, acceptor, defect engineering, electromechanical properties

Abstract

Defects in acceptor-doped perovskite piezoelectric materials have a significant impact on their electrical properties. Herein, the defect mediated evolution of piezoelectric and ferroelectric properties of Fe-doped (Pb,Sr)(Zr,Ti)O3 (PSZT–Fe) piezoceramics with different treatments, including quenching, aging, de-aging, and poling, was investigated systematically. Oxygen vacancies with a cubic symmetry are preserved in the quenched PSZT–Fe ceramics, rendering them robust ferroelectric behaviors. In the aged PSZT–Fe polycrystals, defect dipole between Fe dopant and oxygen vacancy has the same orientation with spontaneous polarization PS, which enables the reversible domain switching and hence leads to the emergence of pinched polarization hysteresis and recoverable strain effect. And the defect dipoles can be gradually disrupted by bipolar electric field cycling, once again endowing the aged materials with representative ferroelectric properties. For the poled PSZT–Fe polycrystals, the defect dipoles are reoriented to be parallel to the applied poling field, and an internal bias field aligning along the same direction emerges simultaneously, being responsible for asymmetric hysteresis loops.

Publisher

Tsinghua University Press

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