Quenching and Electrical Current Poling Effect on Improved Ferroelectric and Piezoelectric Properties in BiFeO3-Based High-Temperature Piezoceramics

Jie Wu; Gaochao Zhao; Wei Dong; Chengbing Pan; Kun Tao; Wenjuan Huang; Peng Tong; Jie Yang; Xuebin Zhu; Lihua Yin; Wenhai Song; Yuping Sun

doi:10.1021/acs.inorgchem.2c01989

Quenching and Electrical Current Poling Effect on Improved Ferroelectric and Piezoelectric Properties in BiFeO₃-Based High-Temperature Piezoceramics

Inorg Chem. 2022 Oct 24;61(42):16622-16631. doi: 10.1021/acs.inorgchem.2c01989. Epub 2022 Oct 10.

Authors

Jie Wu^{1

2}, Gaochao Zhao^{1

2}, Wei Dong^{1

2}, Chengbing Pan^{1

2}, Kun Tao^{1

2}, Wenjuan Huang³, Peng Tong¹, Jie Yang¹, Xuebin Zhu¹, Lihua Yin^{1

2}, Wenhai Song¹, Yuping Sun^{1

4

5}

Affiliations

¹ Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China.
² University of Science and Technology of China, Hefei 230026, People's Republic of China.
³ Changzhou Institute of Technology, Changzhou 213032, People's Republic of China.
⁴ High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, People's Republic of China.
⁵ Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, People's Republic of China.

PMID: 36215719
DOI: 10.1021/acs.inorgchem.2c01989

Abstract

The effects of quenching on the structural, electrical, dielectric, ferroelectric (FE), and piezoelectric properties are investigated systematically in the 0.85BiFe_1-xCr_xO₃-0.15BaTi_1-xMn_xO₃ (0 ≤ x ≤ 0.03) ceramics. Optimal piezoelectricity and FE Curie temperature are obtained through optimized quenching rate and temperature. Quenching effect on piezoelectricity is especially significant for the samples near morphotropic phase boundaries (MPB), which can be ascribed to quenching-induced changes in phase ratio (rhombohedral and tetragonal phase) and domain structure/defect dipole orientation. Moreover, a new poling method, that is, cooling the sample at a constant dc current across FE T_C, is established to improve the piezoelectricity. This work not only reveals the possible mechanism of quenching effect on the improved piezoelectricity in the BFO-based piezoceramics (especially near the MPB) but also suggests an electric current poling strategy for improving piezoelectricity by suppressing the defect dipole effects in BFO-based and even other piezoelectrics.