Ultrahigh electrostrain with excellent fatigue resistance in textured Nb5+-doped (Bi0.5Na0.5)TiO3-based piezoceramics

Lixiang Lai; Zhihao Zhao; Shuo Tian; Bao Ou; Gaoyuan Liang; Bin Li; Yejing Dai

doi:10.26599/JAC.2023.9220698

Journal of Advanced Ceramics 2023, 12(3): 487-497 https://doi.org/10.26599/JAC.2023.9220698

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Open Access | Issue | Published: 15 February 2023

Ultrahigh electrostrain with excellent fatigue resistance in textured Nb⁵⁺-doped (Bi_0.5Na_0.5)TiO₃-based piezoceramics

Show Author's Information Hide Author's Information Lixiang Lai, Zhihao Zhao, Shuo Tian, Bao Ou, Gaoyuan Liang, Bin Li(

), Yejing Dai(

)

School of Materials, Sun Yat-sen University, Shenzhen 518107, China

Keywords:

(Bi_0.5Na_0.5)TiO₃ (BNT)-based ceramics, donor doping, electrostrain, textured ceramics

Cite this article:

Lai L, Zhao Z, Tian S, et al. Ultrahigh electrostrain with excellent fatigue resistance in textured Nb⁵⁺-doped (Bi_0.5Na_0.5)TiO₃-based piezoceramics. Journal of Advanced Ceramics, 2023, 12(3): 487-497. https://doi.org/10.26599/JAC.2023.9220698

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Abstract

(Bi_0.5Na_0.5)TiO₃ (BNT)-based lead-free piezoceramics exhibit excellent electric field-induced strain (electrostrain) properties, but often suffer from large hysteresis and poor fatigue resistance, which strongly limit their applications. Here, <00l> textured Nb⁵⁺-doped 0.8(Bi_0.5Na_0.5)TiO₃–0.2(Bi_0.5K_0.5)TiO₃ (0.8BNT–0.2BKT) ceramics with a high degree of texturing (~80%) were prepared by the reactive template grain growth (RTGG) method using Bi₄Ti₃O₁₂ as a template. By the combination of donor doping in the B-site and the RTGG method, the electrostrain performance achieves a significant enhancement. A high electrostrain of 0.65% and a piezoelectric coefficient ( $d_{33}^{*}$ ) of 1083 pm/V with reduced hysteresis at an electric field of 6 kV/mm are obtained. No electrostrain performance degradation is observed after unipolar electric field loading of 10⁵ cycles, showing excellent fatigue endurance. These results indicate that the texturing BNT-based lead-free piezoceramics by the RTGG method is a useful approach to developing eco-friendly actuators.

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About this article

Ultrahigh electrostrain with excellent fatigue resistance in textured Nb⁵⁺-doped (Bi_0.5Na_0.5)TiO₃-based piezoceramics

Show Author's information Hide Author's Information Lixiang Lai, Zhihao Zhao, Shuo Tian, Bao Ou, Gaoyuan Liang, Bin Li(

), Yejing Dai(

)

School of Materials, Sun Yat-sen University, Shenzhen 518107, China

Abstract

Keywords: (Bi_0.5Na_0.5)TiO₃ (BNT)-based ceramics, donor doping, electrostrain, textured ceramics

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Publication history

Received: 23 September 2022

Revised: 27 October 2022

Accepted: 23 November 2022

Published: 15 February 2023

Issue date: March 2023

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Acknowledgements

This work is financially supported by the National Natural Science Foundation of China (52172135), the Youth Top Talent Project of the National "Ten Thousand Talents Program" (2021-527-07), and the Guangdong Basic and Applied Basic Research Foundation for Distinguished Young Scholars (2021B1515020083 and 2022B1515020070).

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