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Journal of Advanced Ceramics 2023, 12(8): 1593-1611 https://doi.org/10.26599/JAC.2023.9220774
Research Article | Open Access | Issue | Published: 14 August 2023

La2O3-modified BiYbO3–Pb(Zr,Ti)O3 ternary piezoelectric ceramics with enhanced electrical properties and thermal depolarization temperature

Show Author's Information Yu Chena( ),  Lingfeng Lia,  Zhi Zhoua,  Yiying Wanga,  Qiang Chenb,  Qingyuan Wangc( )
School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
College of Materials Science and Engineering, Sichuan University, Chengdu 610064, China
Institute for Advanced Study, Chengdu University, Chengdu 610106, China
Keywords:
La2O3, defect dipoles, BiYbO3–Pb(Zr1−xTix)O3 (BY–PZT) piezoceramics, ferroelectric domain switching (Sswitch), thermal depolarization behaviors
Cite this article:
Chen Y, Li L, Zhou Z, et al. La2O3-modified BiYbO3–Pb(Zr,Ti)O3 ternary piezoelectric ceramics with enhanced electrical properties and thermal depolarization temperature. Journal of Advanced Ceramics, 2023, 12(8): 1593-1611. https://doi.org/10.26599/JAC.2023.9220774
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Abstract Full text About this article

High-performance Pb(Zr1−xTix)O3 (PZT) piezoceramics are urgently desired by the market in view of their expanded operating temperature range, reduced property temperature dependence, and enhanced sensitivity and acoustic power. In this work, we reported a kind of low-cost and high-performance 0.06BiYbO3–0.94Pb(Zr0.48Ti0.52)O3 ternary piezoceramics; the modifying effects of La2O3 on this perovskite system were investigated in terms of the structures, electrical properties, and thermal depolarization behaviors of ceramics. The field-dependent dielectric and conduction properties indicated that there are close correlations among oxygen vacancies (VO), conducting electrons, and intrinsic conduction process. The degradation in ferroelectric properties observed in those samples doped with more than 0.15 wt% of La2O3 indicated that the occupying mechanisms of La3+ changed from the donor substitution for Pb2+ to the isovalent substitution for Bi3+. The thermally depoling micromechanisms of ceramics were revealed from the thermodynamic processes of defect dipoles and intrinsic dipoles within ferroelectric domains. The sample doped with 0.15 wt% of La2O3 shows excellent electrical properties with TC = 387 ℃, d33 = 332 pC/N, TKε = 5.81×10−3 ℃−1, Pr = 20.66 μC/cm2, Td = 356 ℃. The significantly enhanced electrical properties and thermal depolarization temperature benefited from the donor substitution of La3+, decreasing the oxygen vacancy concentration in the lattice and possibly optimizing the ferroelectric domain structure of ceramics.


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About this article

La2O3-modified BiYbO3–Pb(Zr,Ti)O3 ternary piezoelectric ceramics with enhanced electrical properties and thermal depolarization temperature

Show Author's information Yu Chena( ), Lingfeng Lia, Zhi Zhoua, Yiying Wanga, Qiang Chenb, Qingyuan Wangc( )
School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
College of Materials Science and Engineering, Sichuan University, Chengdu 610064, China
Institute for Advanced Study, Chengdu University, Chengdu 610106, China

Abstract

High-performance Pb(Zr1−xTix)O3 (PZT) piezoceramics are urgently desired by the market in view of their expanded operating temperature range, reduced property temperature dependence, and enhanced sensitivity and acoustic power. In this work, we reported a kind of low-cost and high-performance 0.06BiYbO3–0.94Pb(Zr0.48Ti0.52)O3 ternary piezoceramics; the modifying effects of La2O3 on this perovskite system were investigated in terms of the structures, electrical properties, and thermal depolarization behaviors of ceramics. The field-dependent dielectric and conduction properties indicated that there are close correlations among oxygen vacancies (VO), conducting electrons, and intrinsic conduction process. The degradation in ferroelectric properties observed in those samples doped with more than 0.15 wt% of La2O3 indicated that the occupying mechanisms of La3+ changed from the donor substitution for Pb2+ to the isovalent substitution for Bi3+. The thermally depoling micromechanisms of ceramics were revealed from the thermodynamic processes of defect dipoles and intrinsic dipoles within ferroelectric domains. The sample doped with 0.15 wt% of La2O3 shows excellent electrical properties with TC = 387 ℃, d33 = 332 pC/N, TKε = 5.81×10−3 ℃−1, Pr = 20.66 μC/cm2, Td = 356 ℃. The significantly enhanced electrical properties and thermal depolarization temperature benefited from the donor substitution of La3+, decreasing the oxygen vacancy concentration in the lattice and possibly optimizing the ferroelectric domain structure of ceramics.

Keywords: La2O3, defect dipoles, BiYbO3–Pb(Zr1−xTix)O3 (BY–PZT) piezoceramics, ferroelectric domain switching (Sswitch), thermal depolarization behaviors

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Publication history
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Publication history

Received: 06 April 2023
Revised: 19 May 2023
Accepted: 25 May 2023
Published: 14 August 2023
Issue date: August 2023

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© The Author(s) 2023.

Acknowledgements

This work was funded by the National Natural Science Foundation of China (Grant Nos. 11702037 and 11832007), State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and astronautics (Grant No. MCMS-E-0522G01), the Open Foundation of Guangdong Provincial Key Laboratory of Materials and Technologies for Energy Conversion (Grant No. MATEC2022KF001), as well as the Cultivation Project for the Natural Science Foundation and High-level Talent at Chengdu University (Grant No. Z1350).

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