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Dielectric behavior of Ba-doped CaCu3Ti4O12 ceramics prepared from citrate–nitrate combustion derived powders

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Abstract

Ca(Cu3−x Ba x )Ti4O12 ceramics (x = 0, 0.05, 0.1, and 0.2) were prepared by the citrate–nitrate combustion derived powders. Effects of Ba2+ substitution on the microstructure and dielectric properties of CaCu3Ti4O12 ceramics were investigated. The mean grain size decreased with increasing Ba2+ concentration, which was ascribed to the ability of Ba2+ doping to inhibit grain boundary mobility. Substitution of Ba2+ into CCTO improved dielectric stability with frequency and maintained a high dielectric constant and low dielectric loss over a broad range in temperature and frequency compared to the undoped sample.

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Acknowledgments

This work was supported by Fundamental Research Funds for the Central Universities (SWU113057) and (2014054).

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Authors and Affiliations

  1. Faculty of Materials and Energy, Southwest University, Chongqing, 400715, China

    Zunping Xu, Zhiqian Chen & Yi Chen

  2. Chongqing College of Humanities, Science and Technology, Chongqing, 401524, China

    Hua Qiang

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  1. Zunping Xu
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  2. Hua Qiang
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  3. Zhiqian Chen
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  4. Yi Chen
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Correspondence to Zunping Xu.

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Xu, Z., Qiang, H., Chen, Z. et al. Dielectric behavior of Ba-doped CaCu3Ti4O12 ceramics prepared from citrate–nitrate combustion derived powders. J Mater Sci: Mater Electron 26, 578–582 (2015). https://doi.org/10.1007/s10854-014-2437-6

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  • DOI: https://doi.org/10.1007/s10854-014-2437-6

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