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Dielectric properties and defect mechanisms of (1-x)Ba(Fe0.5Nb0.5)O3 -xBiYbO3 ceramics

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Abstract

(1-x)Ba(Fe0.5Nb0.5)O3 -xBiYbO3 (BFN-xBY) ceramics were prepared by a conventional solid-state reaction method. The dielectric properties and relaxation behavior of BFN-xBY ceramics were analyzed according to dielectric and impedance spectroscopy. Dielectric permittivity of the ceramics increases with increasing temperature below 500 K then remains unchanged up to 700 K, while corresponding loss factor decreases with the increase of temperature below 500 K then increase slowly. Defect compensation mechanism of this system was analyzed in detail. The giant dielectric behavior of the ceramics arises from the internal barrier layer capacitor (IBLC) effect. Polarization effect at insulating grain boundaries between semiconducting grains accompanied by a strong Maxwell-Wagner (MW) relaxation mode. The characteristic of grain boundaries was revealed using impedance spectroscope and the universal dielectric response law.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (Nos.11264010, 11564010, 51402196), the Natural Science Foundation of Guangxi (GA139008), Projects of Education Department of Guangxi (No.KY2015YB122) and the Open fund of GuangXi Key Laboratory of Building New Energy and Energy Conservation (No.15-J-21-13). and the China Postdoctoral Science Foundation (Grants 2014 M552229 and 2015 T80915).

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Authors and Affiliations

  1. Guangxi Ministry-Province Jointly-Constructed Cultivation Base for State Key Laboratory of Processing for Non-ferrous Metal and Featured Materials, Guangxi Universities Key Laboratory of Non-ferrous Metal Oxide Electronic Functional Materials and Devices, Guilin, 541004, People’s Republic of China

    Saisai Liu, Xiaojun Sun, Yanmin Huang, Jianming Deng, Congxue Su, Liang Fang & Laijun Liu

  2. Guangxi Key Laboratory of Building New Energy and Energy Conservation, Guilin University of Technology, Guilin, 541004, People’s Republic of China

    Saisai Liu, Xiaojun Sun, Yanmin Huang, Jianming Deng, Congxue Su, Liang Fang & Laijun Liu

  3. School of Physical Science & Technology and Guangxi Key Laboratory for Relativistic Astrophysics, Guangxi University, Nanning, 530004, China

    Biaolin Peng

  4. Henan Province Product Quality Supervision and Inspection Center, Zhengzhou, 450004, China

    Hongbo Su

  5. Henan LiHeng Building Materials Co., Ltd., Zhengzhou, 450001, China

    Zaoming Mei

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  1. Saisai Liu
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Correspondence to Biaolin Peng or Laijun Liu.

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Liu, S., Sun, X., Peng, B. et al. Dielectric properties and defect mechanisms of (1-x)Ba(Fe0.5Nb0.5)O3 -xBiYbO3 ceramics. J Electroceram 37, 137–144 (2016). https://doi.org/10.1007/s10832-016-0047-9

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