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Enhanced electromechanical properties of (Na1/2Bi1/2)TiO3–BaTiO3 lead-free piezoelectric ceramics through alternating current polarization

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Abstract

The piezoelectric and electromechanical properties of 0.94(Na1/2Bi1/2)TiO3–0.06BaTiO3 (NBT–6BT) lead-free piezoelectric ceramic by alternating current polarization (ACP) and direct current polarization (DCP) methods were studied in this work. Results indicated that the thickness-mode electromechanical coupling coefficients (kt) of the NBT–6BT which located around the morphotropic phase boundary (MPB) was significantly improved with an enhancement ratio of 28.6% from 58.1% to 74.7% after ACP compared to DCP. The ferroelectric domain structure and phase structure of the samples after ACP and DCP were investigated using piezoresponse force microscopy and X-ray diffraction, which revealed that the kt enhancement is mainly originated from the higher domain wall density boosted by the ACP.

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Funding

This work was supported by the National Natural Science Foundation of China (Grant nos. 11974250, 62175155, 52172005, and 12104310).

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Authors and Affiliations

  1. Key Laboratory of Optoelectronic Material and Device, Department of Physics, Shanghai Normal University, Shanghai, 200234, China

    Zheng Wu, Jiaqian Yang, Xianyao Jiang, Xucheng Ke, Yu Cai, Tao Wang, Zhihua Duan, Zhongchen Gao & Feifei Wang

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  2. Jiaqian Yang
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  4. Xucheng Ke
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  8. Zhongchen Gao
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Contributions

FFW and ZCG conceived this work and designed the experiments; ZW, JQY, XYJ, XCK, and YC performed the experiment and obtained the data. The data analysis was performed by FFW, ZCG, TW, and ZHD; ZW and FFW wrote the paper. All the authors reviewed and commented on the manuscript.

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Correspondence to Zhongchen Gao or Feifei Wang.

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Wu, Z., Yang, J., Jiang, X. et al. Enhanced electromechanical properties of (Na1/2Bi1/2)TiO3–BaTiO3 lead-free piezoelectric ceramics through alternating current polarization. Appl. Phys. A 129, 215 (2023). https://doi.org/10.1007/s00339-023-06457-9

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