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Review | Open Access

Sodium lithium niobate lead-free piezoceramics for high-power applications: Fundamental, progress, and perspective

Chen-Bo-Wen LIa,b,Zhao LIa,b,Juan WANGc,Yi-Xuan LIUb( )Jing-Tong LUa,bZe XUbPak-Sheng SOONbKe BIa( )Chuan CHENd( )Ke WANGb
State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Department of Stomatology, Beijing Jishuitan Hospital, Beijing 100035, China
Department of Electric Power Sensing Technology, State Grid Smart Grid Research Institute Co., Ltd., Beijing 102211, China

† Chen-Bo-Wen Li, Zhao Li, and Juan Wang contributed equally to this work.

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Abstract

With the capability of interconversion between electrical and mechanical energy, piezoelectric materials have been revolutionized by the implementation of perovskite-piezoelectric-ceramic-based studies over 70 years. In particular, the market of piezoelectric ceramics has been dominated by lead zirconate titanate for decades. Nowadays, the research on piezoelectric ceramics is largely driven by cutting-edge technological demand as well as the consideration of a sustainable society. Hence, environmental-friendly lead-free piezoelectric materials have emerged to replace lead-based Pb(Zr,Ti)O3 (PZT) compositions. Owing to the inherent high mechanical quality factor (Qm) and low energy loss, (Li,Na)NbO3 (LNN) materials have recently drawn increasing attention and brought advantages to high-power piezoelectric applications. Although the crystallographic structures of LNN materials were intensively investigated for decades, the technical strategies for electrical performance are still limited. As a result, the property enhancement appears to have approached a plateau. This review traces the progress in the development of LNN materials, starting from the polymorphism in terms of the crystal structures, phase transitions, and local structural distortions. Then, the key milestone works on the functional tunability of LNN are reviewed with emphasis on involved engineering approaches. The exceptional performance at a large vibration velocity makes LNN ceramics promising for high-power applications, such as ultrasonic welding (UW) and ultrasonic osteotomes (UOs). The remaining challenges and some strategic insights for synergistically engineering the functional performance of LNN piezoceramics are also suggested.

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Journal of Advanced Ceramics
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Cite this article:
LI C-B-W, LI Z, WANG J, et al. Sodium lithium niobate lead-free piezoceramics for high-power applications: Fundamental, progress, and perspective. Journal of Advanced Ceramics, 2023, 12(1): 1-23. https://doi.org/10.26599/JAC.2023.9220687

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Received: 09 September 2022
Revised: 23 October 2022
Accepted: 29 October 2022
Published: 08 December 2022
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