Charge behavior of epoxy/silica nanocomposites under AC high fields

Yutaro Watanabe, Kazuyuki Tohyama, Masahiro Kozako, Shohei Kawano, Koji Ito, Hiroaki Miyake, Yasuhiro Tanaka, Yuichi Hirose, Yoshimichi Ohki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

If a power semiconductor module becomes compact to enhance its wiring density, the electric field at its insulation part should become high. This in turn causes the increase in heat generation per unit volume. Therefore, epoxy resin with high thermal conductivity, a low thermal expansion rate and good anti-aging performance is required. In this regard, we made nano-micro composites (NMCs), namely epoxy resin samples containing both nano-silica filler having high insulating performance and micro-alumina filler having a high thermal conductivity, and observed electroluminescence (EL) and dissipation current waveforms under AC high electric fields for these NMCs simultaneously in order to examine the effects of addition of fillers with different sizes. As a result, it was found that both dissipation current and the number of EL pulses depend on the sample thickness. It was also found that the addition of alumina-micro filler alone into epoxy resin increases the number of EL pulses compared to the neat epoxy and that the NMC shows improved insulating properties. It was also confirmed that the relative permittivity is around 4 for the neat resin and the NMCs, independent of the thickness and the type of fillers.

Original languageEnglish
Title of host publicationICSD 2013 - Proceedings of the 2013 IEEE International Conference on Solid Dielectrics
Pages892-895
Number of pages4
DOIs
Publication statusPublished - 2013 Dec 1
EventICSD 2013 - Proceedings of the 2013 IEEE International Conference on Solid Dielectrics - Bologna, Italy
Duration: 2013 Jun 302013 Jul 4

Publication series

NameProceedings of IEEE International Conference on Solid Dielectrics, ICSD
ISSN (Print)1553-5282
ISSN (Electronic)2159-1687

Other

OtherICSD 2013 - Proceedings of the 2013 IEEE International Conference on Solid Dielectrics
CountryItaly
CityBologna
Period13/6/3013/7/4

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Keywords

  • ac high field
  • epoxy
  • micro-alumina
  • nano-micro composites
  • nano-silica

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Condensed Matter Physics

Cite this

Watanabe, Y., Tohyama, K., Kozako, M., Kawano, S., Ito, K., Miyake, H., Tanaka, Y., Hirose, Y., & Ohki, Y. (2013). Charge behavior of epoxy/silica nanocomposites under AC high fields. In ICSD 2013 - Proceedings of the 2013 IEEE International Conference on Solid Dielectrics (pp. 892-895). [6619853] (Proceedings of IEEE International Conference on Solid Dielectrics, ICSD). https://doi.org/10.1109/ICSD.2013.6619853