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Dielectric Properties of Tungsten Copper Barium Ceramic as Promising Colossal-Permittivity Material

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Abstract

Ba(Cu0.5W0.5)O3 (BCW) ceramic has been fabricated and its dielectric properties investigated for use in energy-storage applications, revealing a very large dielectric constant (∼104) at 1 kHz. Moreover, the colossal-permittivity BCW ceramic exhibited fine microstructure and optimal temperature stability over a wide temperature range from room temperature to 500°C. The internal barrier layer capacitor mechanism was considered to be responsible for its high dielectric properties. Based on activation values, it is concluded that doubly ionized oxygen vacancies make a substantial contribution to the conduction and relaxation behaviors at grain boundaries. This study suggests that this kind of material has potential for use in high-density energy storage applications.

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Acknowledgements

This work was supported by the Shaanxi Province Key Laboratory of Science and Technology Innovation Project (2014SZS09-K04, 2014SZS09-Z01), the Natural Science, and Special Fund of Education Department Foundation of Shaanxi Province of China (101-221206, 101-431116033), Science Foundation of Xi’an University of Technology in China (2015TS002, 101-2560816012), and Devices Research Center of the Shanghai Institute of Ceramics of the Chinese Academy of Sciences (SICCAS) (KLIFMD-2015-04).

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Authors and Affiliations

  1. Advanced Ceramic Material Laboratory, School of Materials Science and Engineering, Xi’an University of Technology, Xi’an, 710048, Shaanxi, People’s Republic of China

    Juanjuan Wang, Guangzhao Li,  Lajun Feng, Kang Zhao & Tiantian Ning

  2. School of Materials Science and Engineering, Shaanxi Normal University, Xi’an, 710062, Shaanxi, People’s Republic of China

    Xiaolian Chao

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  1. Juanjuan Wang
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  2. Xiaolian Chao
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  3. Guangzhao Li
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  4. Lajun Feng
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  5. Kang Zhao
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  6. Tiantian Ning
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Correspondence to Juanjuan Wang.

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Wang, J., Chao, X., Li, G. et al. Dielectric Properties of Tungsten Copper Barium Ceramic as Promising Colossal-Permittivity Material. J. Electron. Mater. 46, 4697–4700 (2017). https://doi.org/10.1007/s11664-017-5504-y

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  • DOI: https://doi.org/10.1007/s11664-017-5504-y

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