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Improved dielectric properties of PVDF composites with Ag-deposited NBCTO hybrid particles

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Abstract

In this work, three-phase Ag-NBCTO/PVDF composites were prepared via solution casting and hot pressing techniques, in which Ag-deposited Na0.5Bi0.5Cu3Ti4O12 (NBCTO) hybrid particles were used as fillers and poly(vinylidene fluoride) (PVDF) was used as a polymer matrix. Ag-NBCTO hybrid particles were prepared by chemical precipitation, and Ag particles were discretely grown on the surface of NBCTO. The effects of Ag-NBCTO hybrid particles on the microstructure and dielectric properties of composites were studied in detail. With the increase in the Ag-NBCTO volume fraction, the dielectric constant is improved due to the enhanced interfacial polarization. The dielectric constant of the composite with fAg-NBCTO = 50 vol% is 139.9 at 1 kHz, nearly 15.9 times higher than that of pristine PVDF, and the dielectric loss remains at a low level of 0.21 at 1 kHz. Meanwhile, the electrical conductivity of all composites is below 2 × 10−8 S/cm at 100 Hz. The composite exhibits potential applications in electronic devices and electrical systems.

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Data availability

The data presented in this study are available on request from the corresponding author.

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Acknowledgements

This work is financially supported by the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing (Wuhan University of Technology) (2020-KF-18).

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Authors and Affiliations

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

    Yanli Su & Yuxiang Chen

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

    Shane Feng

Authors
  1. Yanli Su
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  2. Yuxiang Chen
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  3. Shane Feng
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Contributions

Y.L. Su and Y.X. Chen contributed to the study conception and design. Material preparation, data collection and analysis were performed by Y.L. Su, Y.X. Chen and S. Feng. The first draft of the manuscript was written by Y.L. Su and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Yanli Su.

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Su, Y., Chen, Y. & Feng, S. Improved dielectric properties of PVDF composites with Ag-deposited NBCTO hybrid particles. J Mater Sci: Mater Electron 33, 10752–10760 (2022). https://doi.org/10.1007/s10854-022-08057-4

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  • DOI: https://doi.org/10.1007/s10854-022-08057-4

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