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Dielectric, electromechanical coupling properties of Mn-doped Na0.5Bi0.5TiO3–BaTiO3 lead-free single crystal

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Abstract

Mn-doped 0.948Na0.5Bi0.5TiO3–0.052BaTiO3 (NBBT94.8/5.2) lead-free single crystal with excellent piezoelectric and electromechanical coupling properties was successfully grown by top-seeded solution growth method (TSSG). X-ray powder diffraction measurement showed that the as-grown crystal possesses rhombohedral perovskite structure. The Mn-doped NBBT94.8/5.2 single crystal exhibits apparent diffused dielectric behavior, in which the diffusiveness index α is 1.99 for the [001]-oriented crystal planes. A notable thermal hysteresis is disclosed for the rhombohedral-tetragonal phase transition between heating and cooling studies in the dielectric property. The electromechanical coupling coefficients of Mn-doped NBBT94.8/5.2 were determined experimentally using the resonance–antiresonance technique. The room-temperature electromechanical coupling coefficients k 31, k 31〈110〉, k 33, k t are 35.9%, 35.5%, 68.5%, 58.7%, respectively. The room-temperature piezoelectric constants d 33, d 31 reach as high as 457, 138 pC/N respectively. The value of k t increases slightly with the increase of temperature from −80 to 70°C, demonstrating a relatively stable thermal electromechanical coupling property.

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Authors and Affiliations

  1. Key Laboratory of Inorganic Functional Material and Device, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 215 Chengbei Road, Jiading, Shanghai, 201800, China

    Renbing Sun, Qinhui Zhang, Jie Jiao, Xiaobing Li, Xiangyong Zhao, Di Lin, Dong Wang & Haosu Luo

  2. School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu, 213164, China

    Renbing Sun & Bijun Fang

  3. Graduate School of the Chinese Academy of Sciences, Beijing, 10039, China

    Renbing Sun, Qinhui Zhang, Jie Jiao & Xiaobing Li

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  1. Renbing Sun
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  2. Qinhui Zhang
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  3. Bijun Fang
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  4. Jie Jiao
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  5. Xiaobing Li
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  6. Xiangyong Zhao
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  7. Di Lin
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  8. Dong Wang
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  9. Haosu Luo
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Correspondence to Renbing Sun.

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Sun, R., Zhang, Q., Fang, B. et al. Dielectric, electromechanical coupling properties of Mn-doped Na0.5Bi0.5TiO3–BaTiO3 lead-free single crystal. Appl. Phys. A 103, 199–205 (2011). https://doi.org/10.1007/s00339-010-5994-4

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  • DOI: https://doi.org/10.1007/s00339-010-5994-4

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