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Composites of NBCTO/MWCNTs/PVDF with high dielectric permittivity and low dielectric loss

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Abstract

In this paper, poly(vinylidene fluoride) (PVDF) used as polymer matrix and Na0.5Bi0.5Cu3Ti4O12 (NBCTO) crystallites used as ceramic filler, a three phase NBCTO/MWCNTs/PVDF composite with enhanced dielectric properties was fabricated by solution-casting and hot pressing process, in which multi-walled carbon nanotubes (MWCNTs) used as conductive filler. The microstructure and dielectric properties of three phase composites were investigated. Results showed that MWCNTs could greatly improve the dielectric properties of composites and decrease the percolation threshold. High dielectric permittivity of 228 with low dielectric loss of 0.41 at 1 kHz was obtained for the fabricated 46 vol%NBCTO/4 vol%MWCNTs/50 vol%PVDF composite. Based on the electrical modulus, ac conductivity and percolation theory, a lower percolation threshold of 4.9 vol% was calculated. Such three phase composites would have great potential in electronic applications.

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Acknowledgements

This work was supported by the Natural Science Foundation of Jiangsu Province (BK20130314) and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

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Authors and Affiliations

  1. College of Chemistry, Chemical Engineering and Material Science, Soochow University, Suzhou, 215123, China

    Yanli Su & Yiqi Gu

  2. Analysis and Testing Center, Soochow University, Suzhou, 215123, China

    Shane Feng

Authors
  1. Yanli Su
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  2. Yiqi Gu
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  3. Shane Feng
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Correspondence to Yanli Su or Shane Feng.

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Su, Y., Gu, Y. & Feng, S. Composites of NBCTO/MWCNTs/PVDF with high dielectric permittivity and low dielectric loss. J Mater Sci: Mater Electron 29, 2416–2420 (2018). https://doi.org/10.1007/s10854-017-8160-3

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  • DOI: https://doi.org/10.1007/s10854-017-8160-3

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