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Dielectric and nonlinear electrical behaviors of Ce-doped CaCu3Ti4O12 ceramics

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Abstract

We present a remarkable effect of Ce doping on the dielectric and nonlinear electric properties of CaCu3Ti4O12 ceramics. Microstructure analysis indicates that Ce-doped CCTO ceramics are composed of large and small grains. Our results indicate that only 2.5 at. % Ce doping can suppress the dielectric permittivity in CaCu3Ti4O12 by up to two orders of magnitude (from 104 to 102 ), and the nonlinear varistor characteristics disappear completely, which may be due mainly to the Cu+ ions’ disappearing caused by the Ce doping.

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Acknowledgements

This work was financially supported by the Ministry of Science and Technology of China through a 973-Project under Grant No. 2009CB623303, NSF of China 50972068, 51025205, 50921061 and NSF of Beijing 2092016.

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Authors and Affiliations

  1. State Key Lab of New Ceramics and Fine Processing, and Department of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People’s Republic of China

    Bo Cheng, Yuan-Hua Lin, Wei Deng, Jingnan Cai, Jinle Lan & Ce-Wen Nan

  2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, People’s Republic of China

    Wei Deng

  3. Department of Electrical Engineering, Tsinghua University, Beijing, 100084, People’s Republic of China

    Xi Xiao & Jinliang He

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  1. Bo Cheng
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  2. Yuan-Hua Lin
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  3. Wei Deng
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  4. Jingnan Cai
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  5. Jinle Lan
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  6. Ce-Wen Nan
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  7. Xi Xiao
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  8. Jinliang He
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Correspondence to Yuan-Hua Lin.

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Cheng, B., Lin, YH., Deng, W. et al. Dielectric and nonlinear electrical behaviors of Ce-doped CaCu3Ti4O12 ceramics. J Electroceram 29, 250–253 (2012). https://doi.org/10.1007/s10832-012-9768-6

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  • DOI: https://doi.org/10.1007/s10832-012-9768-6

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