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

Journal of Advanced Ceramics

Qing Tan¹  Fang-Zhou Yao²  Zong-Yue Li³  Bing Han⁴  Yan Wang⁵  Chuan Chen⁵  Chun Liu⁶  Ke Wang⁷  Wen Gong⁸ 

[1]Beijing Advanced Innovation Center for Materials Genome Engineering, State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, 100083, Beijing, China

[2]Center of Advanced Ceramic Materials and Devices, Yangtze Delta Region Institute of Tsinghua University, 314006, Zhejiang, China

[3]State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, 710049, Xi’an, China

[4]Foshan (Southern China) Institute for New Materials, 528200, Foshan, China

[5]China Aerospace Science and Industry Corporation, 100048, Beijing, China

[6]Department of Orthodontics & National Engineering Laboratory for Digital and Material Technology, Peking University School and Hospital of Stomatology, 100081, Beijing, China

[7]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, 102209, Beijing, China

[8]Naqu Branch of Tibet Electric Limited Company, 852000, Naqu, China

[9]State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, 100084, Beijing, China

[10]State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, 100084, Beijing, China

[11]Center of Advanced Ceramic Materials and Devices, Yangtze Delta Region Institute of Tsinghua University, 314006, Zhejiang, China

关键词: lead-zirconate-titanate (PZT);    piezoelectric;    acceptor;    defect engineering;    electromechanical properties;   

DOI  :  10.1007/s40145-021-0460-7

来源: Springer

【 摘 要 】

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.

【 授权许可】

CC BY