Enhanced partial discharge resistance of epoxy/clay nanocomposite prepared by newly developed organic modification and solubilization methods

Toshikatsu Tanaka, Yoshimichi Ohki, Mitsukazu Ochi, Miyuki Harada, Takahiro Imai

Research output: Contribution to journalArticle

128 Citations (Scopus)


Frequency accelerated partial discharge (PD) aging of epoxy nanocomposite with 5 wt % additions of clay was investigated in comparison with that of epoxy without clay in terms of PD erosion depth. It was found that the change in the erosion depth is far smaller in specimens with clay than those without clay. The newly developed organic modification and solubilization methods give comparable PD resistance characteristics. The latter would be more resistant to PD's than the former, if specimens were prepared properly. It was clarified that nano-micro mixed composites were superior to the single nanocomposite. Nano segmentation with some interaction zone effect is proposed as a mechanism of improvement in PD resistance.

Original languageEnglish
Pages (from-to)81-89
Number of pages9
JournalIEEE Transactions on Dielectrics and Electrical Insulation
Issue number1
Publication statusPublished - 2008 Feb
Externally publishedYes



  • Epoxy nanocomposite
  • Epoxy resin
  • Frequency acceleration
  • Partial discharge
  • Surface degradation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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