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Journal of Advanced Ceramics 2023, 12(2): 373-385 https://doi.org/10.26599/JAC.2023.9220690
Research Article | Open Access | Issue | Published: 17 January 2023

(K,Na)NbO3-based lead-free ceramics with enhanced temperature-stable piezoelectricity and efficient red luminescence

Show Author's Information Qing Liua,†( ),  Er Pana,†,  Fucai Liua( ),  Jing-Feng Lib
School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

† Qing Liu and Er Pan contributed equally to this work.

Keywords:
piezoelectric, thermal stability, lead-free, rare-earth, potassium−sodium niobate (KNN)
Cite this article:
Liu Q, Pan E, Liu F, et al. (K,Na)NbO3-based lead-free ceramics with enhanced temperature-stable piezoelectricity and efficient red luminescence. Journal of Advanced Ceramics, 2023, 12(2): 373-385. https://doi.org/10.26599/JAC.2023.9220690
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Abstract Full text About this article

There has been a surge of research interest in the promising lead-free potassium−sodium niobate (KNN)-based ceramics, applications of which could be significantly promoted by improving thermal stability of piezoelectricity. Besides, endowing the KNN-based ceramics with photoluminescence property by rare-earth-ion doping can make them more completive lead-free counterparts in potential applications such as novel multifunctional sensing devices. Herein, a novel KNN-based ceramic material doped with Eu was elaborately designed to simultaneously obtain enhanced temperature-stable piezoelectricity and good luminescence property. By the introduction of diffused phase transition and the modulation of unit cell distortion, a large piezoelectric strain coefficient (d*33) with a small variation (590±59 pm/V) over a wide temperature range (from room temperature to 110 ℃) was realized. The optimal composition also exhibited a considerable piezoelectric coefficient (d33) with small fluctuation (330±33 pC/N) from 20 to 80 ℃. In addition to the enhanced temperature-stable piezoelectricity, the luminescence of these ceramics was slightly enhanced with the elevation of BaZrO3 (BZ) doping contents, which could be attributed to the increased compositional disorder and the decreased unit cell distortion of the matrix material. Moreover, an optical characteristic was more prominent at ultra-low temperatures. This work unprecedentedly provides a novel paradigm for the design of multifunctional KNN-based ceramics with enhanced temperature-stable piezoelectricity and good luminescence property, revealing the great potential of the rare-earth-element-doped KNN material for future applications in the novel multifunctional devices.


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About this article

(K,Na)NbO3-based lead-free ceramics with enhanced temperature-stable piezoelectricity and efficient red luminescence

Show Author's information Qing Liua,†( ), Er Pana,†, Fucai Liua( ), Jing-Feng Lib
School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

† Qing Liu and Er Pan contributed equally to this work.

Abstract

There has been a surge of research interest in the promising lead-free potassium−sodium niobate (KNN)-based ceramics, applications of which could be significantly promoted by improving thermal stability of piezoelectricity. Besides, endowing the KNN-based ceramics with photoluminescence property by rare-earth-ion doping can make them more completive lead-free counterparts in potential applications such as novel multifunctional sensing devices. Herein, a novel KNN-based ceramic material doped with Eu was elaborately designed to simultaneously obtain enhanced temperature-stable piezoelectricity and good luminescence property. By the introduction of diffused phase transition and the modulation of unit cell distortion, a large piezoelectric strain coefficient (d*33) with a small variation (590±59 pm/V) over a wide temperature range (from room temperature to 110 ℃) was realized. The optimal composition also exhibited a considerable piezoelectric coefficient (d33) with small fluctuation (330±33 pC/N) from 20 to 80 ℃. In addition to the enhanced temperature-stable piezoelectricity, the luminescence of these ceramics was slightly enhanced with the elevation of BaZrO3 (BZ) doping contents, which could be attributed to the increased compositional disorder and the decreased unit cell distortion of the matrix material. Moreover, an optical characteristic was more prominent at ultra-low temperatures. This work unprecedentedly provides a novel paradigm for the design of multifunctional KNN-based ceramics with enhanced temperature-stable piezoelectricity and good luminescence property, revealing the great potential of the rare-earth-element-doped KNN material for future applications in the novel multifunctional devices.

Keywords: piezoelectric, thermal stability, lead-free, rare-earth, potassium−sodium niobate (KNN)

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Publication history
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Publication history

Received: 06 July 2022
Revised: 15 October 2022
Accepted: 31 October 2022
Published: 17 January 2023
Issue date: February 2023

Copyright

© The Author(s) 2022.

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 52002051 and 62074025), the Fundamental Research Funds for the Central Universities (No. ZYGX2020J009), and the Applied Basic Research Program of Sichuan Province (No. 2021JDGD0026).

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