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Phase evolution and dielectric properties of Ba(Ti1/6Sn1/6Zr1/6Hf1/6Nb1/6Ga1/6)O3 high-entropy perovskite ceramics

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Abstract

High-entropy ceramics (HECs), Ba(Ti1/6Sn1/6Zr1/6Hf1/6Nb1/6Ga1/6)O3, with perovskite structure were successfully synthesized through solid-state reaction method. HECs can be divided into three stages in the calcination process: from multiphase state to two-phase state and finally to single-phase perovskite structure. High entropy is the main driving force for the formation of perovskite HECs. The equilibrium phase of 1500 °C was transformed back to its multiphase state at low temperature, and vice versa on heating. The elements of the HECs are homogeneously distributed, and the relative density of the ceramic is 92.7%. The microstructures are fine, in which the average grain size is less than 1 μm. The dielectric constant εr and loss tangent tan δ exhibit slightly frequency dispersion.

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Acknowledgement

This work was financially supported by the National Nature Science Foundation of China under Grant (No. 51972048) and the Natural Science Foundation of Hebei Province (No. E2018501042).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, People’s Republic of China

    Qiang Du, Jinhua Yan, Xiaoyan Zhang, Jinsheng Li, Xinyue Liu & Jinrong Zhang

  2. School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, People’s Republic of China

    Qiang Du, Jinhua Yan, Xiaoyan Zhang, Jinsheng Li, Xinyue Liu & Jinrong Zhang

  3. Key Laboratory of Dielectric and Electrolyte Functional Material, Qinhuangdao, 066004, Hebei, People’s Republic of China

    Xiaoyan Zhang, Jinsheng Li & Xiwei Qi

  4. College of Metallurgy and Energy, North China of Science and Technology, Tangshan, 063210, People’s Republic of China

    Xiwei Qi

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  1. Qiang Du
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  2. Jinhua Yan
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  3. Xiaoyan Zhang
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Correspondence to Xiwei Qi.

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The authors would like to declare on behalf of their co-authors that the work described is original research and has not been published previously, and not under consideration for publication elsewhere, in whole or in part. All the authors listed have approved the manuscript that is enclosed, and there is no conflict of interests during the submission of this manuscript. If accepted, this manuscript will not be published elsewhere in the same form, in English or in any other language, without the written consent.

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Du, Q., Yan, J., Zhang, X. et al. Phase evolution and dielectric properties of Ba(Ti1/6Sn1/6Zr1/6Hf1/6Nb1/6Ga1/6)O3 high-entropy perovskite ceramics. J Mater Sci: Mater Electron 31, 7760–7765 (2020). https://doi.org/10.1007/s10854-020-03313-x

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