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Structure and electrical properties of (Na0.5Bi0.5)1−x Ba x TiO3 ceramics made by a citrate method

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Abstract

(Na0.5Bi0.5)1−x Ba x TiO3 (x = 0–0.12) powders were synthesized by a citrate method, and the structure and electrical properties of the resulting ceramics were investigated. A gradual change of crystal structure with the increase of BaTiO3 concentration was detected together with a significant evolution in grain size and shape. A rhombohedral-tetragonal morphotropic phase boundary (MPB) near x = 0.06 at room temperature was ascertained for the ceramics. The dielectric constant (ɛ r) and dissipation factor (tanδ) attain maximum values at x = 0.08 and x = 0.06, respectively. The specimen of x = 0.06 provides the maximum piezoelectric constant (d 33 = 180 pC/N) and electromechanical coupling factor (k p = 0.28), accompanied by a large remanent polarization of P r = 37.1 μC/cm2 and a low coercive field of E c  = 42.7 kV/cm.

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Acknowledgements

This work was financially supported by the Program for New Century Excellent Talents in University (Grant No. NCET-04-0724). It is grateful to the Natural Science Foundation of China (Grant No. 50272044 and 50410529) and Korea Science and Engineering Foundation (Grant No. F01-2004-000-10084-0) for jointly supporting the research.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, People’s Republic of China

    Qing Xu, Xin-Liang Chen, Wen Chen, Su-Long Xu & Min Chen

  2. Division of Advanced Materials Engineering, Chonbuk National University, Chonju, 561756, Republic of Korea

    Bok-Hee Kim

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  1. Qing Xu
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  2. Xin-Liang Chen
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  3. Wen Chen
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  6. Min Chen
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Correspondence to Qing Xu.

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Xu, Q., Chen, XL., Chen, W. et al. Structure and electrical properties of (Na0.5Bi0.5)1−x Ba x TiO3 ceramics made by a citrate method. J Electroceram 21, 617–620 (2008). https://doi.org/10.1007/s10832-007-9281-5

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  • DOI: https://doi.org/10.1007/s10832-007-9281-5

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