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Effects of MgO Content on Dielectric Properties of Ba0.94Bi0.04Sn0.06Ti0.94O3/MgO Composite Ceramics

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Abstract

The composite ceramics of Ba0.94Bi0.04Sn0.06Ti0.94O3 (BBST) with x wt.% MgO (0 ≤ x ≤ 30) were prepared by solid-state sintering. The effects of MgO content on the microstructure and dielectric properties of the composite ceramics have been investigated. The results show that MgO is uniformly distributed in BBST matrix and enhances the relative density of composite ceramics remarkably, which effectively optimizes the performances of dielectric loss, alternating current (AC) breakdown strength (BDS) and insulation. With the content of MgO increasing from 0 wt.% to 30 wt.%, the dielectric constant decreases from 2900 to 920, dielectric loss decreases from 0.011 to 0.0065, BDS is improved from 26 kV/cm to 53.6 kV/cm and leakage current density decreases from 2.96 × 10−7 A/cm2 to 9.55 × 10−8 A/cm2. The ceramic added with 30 wt.% MgO exhibits the best comprehensive dielectric properties, which is a superior dielectric used in high-voltage ceramic capacitors.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 51477012).

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Authors and Affiliations

  1. Advanced Electronic Materials Institute, General Research Institute for Nonferrous Metals, Beijing, 100088, People’s Republic of China

    Peng Zhou, Qingmeng Zhang, Hao Zhou, Feihu Tan & Junyou Chen

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  1. Peng Zhou
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  2. Qingmeng Zhang
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  3. Hao Zhou
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  4. Feihu Tan
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  5. Junyou Chen
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Correspondence to Qingmeng Zhang.

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Zhou, P., Zhang, Q., Zhou, H. et al. Effects of MgO Content on Dielectric Properties of Ba0.94Bi0.04Sn0.06Ti0.94O3/MgO Composite Ceramics. J. Electron. Mater. 46, 4912–4916 (2017). https://doi.org/10.1007/s11664-017-5499-4

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  • DOI: https://doi.org/10.1007/s11664-017-5499-4

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