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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.


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

Show Author's information Chuan CHENaYan WANGaZong-Yue LIbChun LIUcWen GONGd,e( )Qing TANf( )Bing HANg( )Fang-Zhou YAOe,h,i( )Ke WANGd
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
China Aerospace Science and Industry Corporation, Beijing 100048, China
Naqu Branch of Tibet Electric Limited Company, Naqu 852000, China
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
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
Department of Orthodontics & National Engineering Laboratory for Digital and Material Technology, Peking University School and Hospital of Stomatology, Beijing 100081, China
State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
Foshan (Southern China) Institute for New Materials, Foshan 528200, China

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.

Keywords:

lead–zirconate–titanate (PZT), piezoelectric, acceptor, defect engineering, electromechanical properties
Received: 16 October 2020 Revised: 18 December 2020 Accepted: 12 January 2021 Published: 24 February 2021 Issue date: June 2021
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Publication history

Received: 16 October 2020
Revised: 18 December 2020
Accepted: 12 January 2021
Published: 24 February 2021
Issue date: June 2021

Copyright

© The Author(s) 2021

Acknowledgements

This work is supported by the National Natural Science Foundation of China (Grant Nos. 51702252 and 51972005), the Natural Science Basic Research Program of Shaanxi (Grant No. 2020JQ-066), and State Grid Corporation of China Co., Ltd. (Grant Nos. SGGR0000DCJS2000678 and 5500-202024252A-0-0-00).

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