Finite element modeling of effective permittivity in nanoporous epoxy composite filled with hollow nanosilica

The relative permittivity of nanoporous epoxy composites (NPCs) filled with hollow nanosilica is lower than that of unfilled epoxy resin. The low permittivity is considered to arise from the existence of cavity volume, but the effects of nanosilica particle shape, particle size distribution and aggl...

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Bibliographic Details
Published in:IEEE transactions on dielectrics and electrical insulation 2019-10, Vol.26 (5), p.1434-1440
Main Authors: Kurimoto, Muneaki, Kato, Chiharu, Kato, Takeyoshi, Yoshida, Takuma, Yamashita, Yuu, Suzuoki, Yasuo
Format: Article
Language:English
Subjects:
Agglomeration
Atmospheric modeling
Cavity resonators
Electric fields
epoxy
Epoxy resins
Finite element method
Holes
hollow nanosilica
Mathematical models
nanoporous composite
Particle shape
Particle size
Particle size distribution
Permittivity
Permittivity measurement
Shape
Shape effects
Silicon compounds
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Summary:The relative permittivity of nanoporous epoxy composites (NPCs) filled with hollow nanosilica is lower than that of unfilled epoxy resin. The low permittivity is considered to arise from the existence of cavity volume, but the effects of nanosilica particle shape, particle size distribution and agglomeration are not clear. In this study, the relative permittivity of an NPC filled with hollow nanosilica is modeled by using finite-element method including the above-mentioned factors. The proposed model successfully reproduces the experimentally-obtained low permittivity of NPCs. The effect of cavities is significant, while particle corner shape, particle size distribution or particle agglomeration is not dominant.
ISSN:1070-9878
1558-4135
DOI:10.1109/TDEI.2019.008032