Ultrahigh electromechanical coupling and its thermal stability in (Na1/2Bi1/2)TiO3-based lead-free single crystals

Chao Chen; Li Yang; Xingan Jiang; Xiaokun Huang; Xiaoyi Gao; Na Tu; Kaizheng Shu; Xiangping Jiang; Shujun Zhang; Haosu Luo

doi:10.3390/cryst10060435

Ultrahigh electromechanical coupling and its thermal stability in (Na_1/2Bi_1/2)TiO₃-based lead-free single crystals

Chao Chen^*, Li Yang, Xingan Jiang, Xiaokun Huang, Xiaoyi Gao, Na Tu, Kaizheng Shu, Xiangping Jiang, Shujun Zhang, Haosu Luo

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

7 Citations (Scopus)

Abstract

In this work, we report the ultrahigh electromechanical coupling performance of NBT-6BT-KNN lead-free single crystal at room temperature. The thickness mode electromechanical coupling coefficient (k_t) and the 31 mode electromechanical coupling coefficient (k₃₁) reach 69.0% and 45.7%, respectively, which are superior to the PZT-5H lead-based ceramics of k_t ~ 60% and k₃₁~39%. In addition, the evolution of the crystal structure and domain morphology is revealed by Raman scattering spectra, a polarizing microscope and piezoelectric force microscopy characterization. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.

Original language	English
Article number	435
Journal	Crystals
Volume	10
Issue number	6
Online published	29 May 2020
DOIs	https://doi.org/10.3390/cryst10060435
Publication status	Published - Jun 2020
Externally published	Yes

Funding

This work is financially supported by the National Natural Science Foundation of China (51862016, 51762024, 51602135), the Foundation of Jiangxi Provincial Education Department (GJJ190712). The author (Chao Chen) wishes to acknowledge the support from the Jiangxi Voyage Project and China Scholarship Council. The author also thanks Kunyu Zhao for performing the PFM measurements.

Research Keywords

Domain structure
Electromechanical coupling
Lead-free single crystal
NBT-based
Phase transition

Publisher's Copyright Statement

This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

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Cite this

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abstract = "In this work, we report the ultrahigh electromechanical coupling performance of NBT-6BT-KNN lead-free single crystal at room temperature. The thickness mode electromechanical coupling coefficient (kt) and the 31 mode electromechanical coupling coefficient (k31) reach 69.0% and 45.7%, respectively, which are superior to the PZT-5H lead-based ceramics of kt ~ 60% and k31~39%. In addition, the evolution of the crystal structure and domain morphology is revealed by Raman scattering spectra, a polarizing microscope and piezoelectric force microscopy characterization. {\textcopyright} 2020 by the authors. Licensee MDPI, Basel, Switzerland.",

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author = "Chao Chen and Li Yang and Xingan Jiang and Xiaokun Huang and Xiaoyi Gao and Na Tu and Kaizheng Shu and Xiangping Jiang and Shujun Zhang and Haosu Luo",

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T1 - Ultrahigh electromechanical coupling and its thermal stability in (Na1/2Bi1/2)TiO3-based lead-free single crystals

AU - Chen, Chao

AU - Yang, Li

AU - Jiang, Xingan

AU - Huang, Xiaokun

AU - Gao, Xiaoyi

AU - Tu, Na

AU - Shu, Kaizheng

AU - Jiang, Xiangping

AU - Zhang, Shujun

AU - Luo, Haosu

PY - 2020/6

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N2 - In this work, we report the ultrahigh electromechanical coupling performance of NBT-6BT-KNN lead-free single crystal at room temperature. The thickness mode electromechanical coupling coefficient (kt) and the 31 mode electromechanical coupling coefficient (k31) reach 69.0% and 45.7%, respectively, which are superior to the PZT-5H lead-based ceramics of kt ~ 60% and k31~39%. In addition, the evolution of the crystal structure and domain morphology is revealed by Raman scattering spectra, a polarizing microscope and piezoelectric force microscopy characterization. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.

AB - In this work, we report the ultrahigh electromechanical coupling performance of NBT-6BT-KNN lead-free single crystal at room temperature. The thickness mode electromechanical coupling coefficient (kt) and the 31 mode electromechanical coupling coefficient (k31) reach 69.0% and 45.7%, respectively, which are superior to the PZT-5H lead-based ceramics of kt ~ 60% and k31~39%. In addition, the evolution of the crystal structure and domain morphology is revealed by Raman scattering spectra, a polarizing microscope and piezoelectric force microscopy characterization. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.

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KW - NBT-based

KW - Phase transition

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