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Published in: Journal of Materials Science 34/2020

28-08-2020 | Composites & nanocomposites

Enhanced dielectric properties of polyvinylidene fluoride-based composite films with layered perovskite KCa2Na3Nb6O19-derived fillers

Authors: Yumi Inagaki, Takahiro Kozawa, Kazuhisa Yano, Tadashi Nakamura

Published in: Journal of Materials Science | Issue 34/2020

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Abstract

A polyvinylidene fluoride (PVDF)-based composite film embedded with plate-like fillers was investigated as a novel dielectric composite material that can serve as a candidate film capacitor. Plate-like particles of the dielectric Ca2Na3Nb6O19 (CNN6) filler material were prepared through liquid-phase exfoliation of KCa2Na3Nb6O19 synthesized by a conventional solid-state reaction method. CNN6 fillers with an average aspect ratio of 2.0 were successfully dispersed in a PVDF matrix without large aggregation using a solution blending and casting method. The resultant CNN6/PVDF composite film exhibited higher breakdown strength than a dielectric PVDF-based composite embedded with spherical BaTiO3 fillers. The superiority of the plate-like filler particles over spherical filler particles was qualitatively confirmed by finite element simulation using a simplified filler/matrix model. A CNN6/PVDF composite film with a thickness of 3.8 µm exhibited a high capacitance density of 10.1 F m−3, which was three times higher than that of a biaxially oriented polypropylene film currently used for film capacitors in the power control units of hybrid vehicles.

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Metadata
Title
Enhanced dielectric properties of polyvinylidene fluoride-based composite films with layered perovskite KCa2Na3Nb6O19-derived fillers
Authors
Yumi Inagaki
Takahiro Kozawa
Kazuhisa Yano
Tadashi Nakamura
Publication date
28-08-2020
Publisher
Springer US
Published in
Journal of Materials Science / Issue 34/2020
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI
https://doi.org/10.1007/s10853-020-05169-2

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