4.6 Article

Enhanced polarization of PVDF composite films by trace BiFeO3 fiber filler

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SPRINGER
DOI: 10.1007/s10854-021-06492-3

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资金

  1. National Natural Science Foundation of China [51572160]
  2. Natural Science Foundation of Shaanxi Province [2017KJXX-44]
  3. Graduate Innovation Fund of Shaanxi University of Science and Technology

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This study focuses on the development of flexible dielectric composite films with high energy density at low electric fields, achieved by using semiconductor nanofibers as fillers in a PVDF matrix. The addition of BiFeO3 fibers significantly improved the polarization of the composite films at low electric fields. The changes in filler content positively influenced the interfacial area, polarization, and phase composition in the composite films.
Dielectric materials with high energy density at low electric fields play an important role in the development of electronic devices. In this study, flexible dielectric composite films are reported by semiconductor nanofibers as fillers and PVDF as matrix. Compared to pure PVDF, the polarization of the composite films was significantly improved at low electric field by the addition of a trace of BiFeO3 fibers. Based on the mixing rule, the effect of interface area on the polarization of composite films was discussed. The change of filler content was positively related to the interfacial area and polarization between filler and PDVF matrix in the composite films. The change of filler content also affected the content of alpha-phase and beta-phase in composite films.

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