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Phase formation and dielectric properties of Ba0.5Sr0.5TiO3 by slow injection sol–gel technique

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Abstract

A simple sol–gel process incorporating slow precursor injection technique was employed to synthesize homogeneous Ba0.5Sr0.5TiO3 nano powders. The Ba0.5Sr0.5TiO3 samples were subjected to calcination temperatures from 600 to 1,100 °C and sintering temperatures from 1,250 to 1,350 °C for the study of phase formation, crystallite size, particle distribution, and dielectric properties. Single phase Ba0.5Sr0.5TiO3 with a cubic perovskite structure was successfully synthesized after calcination at 800 °C. The average size of the nano particles is 42 nm with a narrow size distribution, and a standard deviation of 10%. The highest values recorded within the investigated range for dielectric constant, and dielectric loss measured at 1 kHz are 1,164 and 0.063, respectively, for Ba0.5Sr0.5TiO3 pellets calcined at 800 °C and sintered at 1,350 °C. Leakage current density measured at 5 V for the Ba0.5Sr0.5TiO3 pellet was found to be 49.4 pA/cm2.

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Acknowledgements

The authors are grateful to the Ministry of Science, Technology and Innovation (MOSTI), Malaysia for supporting this study under eScience Fund (Project No. 03-02-01-SF0059) as well as Ms Zaidina Bt Mohd Daud, Mr Sharul Ami b. Zainal Abidin and Mr Kenny Gan Chye Siong for their assistance with the characterizations.

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Authors and Affiliations

  1. Faculty of Engineering, Multimedia University, 63100, Cyberjaya, Selangor, Malaysia

    R. Balachandran, H. K. Yow & B. H. Ong

  2. Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia

    K. B. Tan

  3. Department of Chemistry, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia

    K. Anuar

  4. Department of Environmental Engineering, Nagaoka University of Technology, Niigata, 940-2188, Japan

    W. T. Teoh

  5. School of Materials & Mineral Resource Engineering, Engineering Campus, Universiti Sains Malaysia, 14300, Nibong Tebal, Malaysia

    M. N. Ahmad Fauzi & S. Sreekantan

  6. School of Material Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore

    V. Swaminathan

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  1. R. Balachandran
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  2. H. K. Yow
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Correspondence to R. Balachandran.

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Balachandran, R., Yow, H.K., Ong, B.H. et al. Phase formation and dielectric properties of Ba0.5Sr0.5TiO3 by slow injection sol–gel technique. J Mater Sci 46, 1806–1813 (2011). https://doi.org/10.1007/s10853-010-5004-4

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  • DOI: https://doi.org/10.1007/s10853-010-5004-4

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