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Temperature-stable high relative permittivity in Ca-doped Ba0.5Bi0.5Ti0.75Mg0.25O3 ceramics

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Abstract

Ba0.5−x Ca x Bi0.5Ti0.75Mg0.25O3 (BCTM) ceramics were processed through a conventional solid state route. X-ray diffraction analysis of the compositions showed single phase cubic perovskite structure, consistent with the Raman studies. The microstructure of sintered ceramics comprised dense packed grains. Relative permittivity was observed to decrease with increase in Ca2+ concentration, presumably due to smaller ionic polarizability of Ca2+ than Ba2+. The samples exhibited high relative permittivity (1565–1980) stable over a wide range of temperature as high as 550 °C along with a high resistivity of the order 109–1010 Ω cm, suitable for high temperature applications.

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Acknowledgements

The author (Raz Muhammad) thanks to higher education commission of Pakistan for research fellowship at the University of Sheffield, UK.

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Authors and Affiliations

  1. Department of Physics, Abdul Wali Khan University, Mardan, KP, Pakistan

    Raz Muhammad

  2. Department of Materials Science and Engineering, University of Sheffield, S1 3JD, Sheffield, UK

    Amir Khesro

  3. Department of Physics, University of Peshawar, Peshawar, 25120, KP, Pakistan

    Yaseen Iqbal

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  1. Raz Muhammad
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  2. Amir Khesro
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  3. Yaseen Iqbal
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Correspondence to Raz Muhammad.

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Muhammad, R., Khesro, A. & Iqbal, Y. Temperature-stable high relative permittivity in Ca-doped Ba0.5Bi0.5Ti0.75Mg0.25O3 ceramics. J Mater Sci: Mater Electron 28, 6763–6768 (2017). https://doi.org/10.1007/s10854-017-6372-1

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  • DOI: https://doi.org/10.1007/s10854-017-6372-1

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