Generation time and morphology of infancy trees in epoxy/silica nanocomposite

Toshikatsu Tanaka, Tomonori Iizuka, Jiandong Wu

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

2 Citations (Scopus)

Abstract

Infancy trees, i.e. trees in their early stage, in neat epoxy and epoxy/silica nanocomposite were investigated in terms of their generation time and morphology. Generation time represented by V-t characteristics obeys a formula Voct-n. It is to be noted that similar effects are imposed not only on mm order long trees but also on several tens μm order short infancy trees. Infancy tree generation time is increased by nano filler 5 wt% addition and by surface treatment of nano filler. The same thing can be said to a value 'n'. As for morphology of the infancy trees, it was clarified from optical microscope observation that there is no significant difference either in epoxy or in nanocomposite, as far as their lengths are almost the same. An infancy tree seems to grow at first between neighboring nano filler particles and to extend by contacting nano filler particles in their growing path. Since the infancy tree is thin in the beginning and becomes thick afterwards, chance of the tree to meet with nano filler is considered to be increase.

Original languageEnglish
Title of host publicationProceedings of 2011 International Conference on Electrical Insulating Materials, ISEIM 2011
PublisherInstitute of Electrical Engineers of Japan
Pages5-8
Number of pages4
ISBN (Print)9784886860743, 9784886860743
DOIs
Publication statusPublished - 2011 Jan 1
Event2011 International Conference on Electrical Insulating Materials, ISEIM 2011 - Kyoto, Japan
Duration: 2011 Sep 62011 Sep 11

Publication series

NameProceedings of the International Symposium on Electrical Insulating Materials

Conference

Conference2011 International Conference on Electrical Insulating Materials, ISEIM 2011
CountryJapan
CityKyoto
Period11/9/611/9/11

Keywords

  • V-t charactersitics
  • epoxy
  • nanocomposite
  • silica
  • tree initiation
  • tree morphology
  • treeing
  • treeing breakdown

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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  • Cite this

    Tanaka, T., Iizuka, T., & Wu, J. (2011). Generation time and morphology of infancy trees in epoxy/silica nanocomposite. In Proceedings of 2011 International Conference on Electrical Insulating Materials, ISEIM 2011 (pp. 5-8). [6826262] (Proceedings of the International Symposium on Electrical Insulating Materials). Institute of Electrical Engineers of Japan. https://doi.org/10.1109/iseim.2011.6826262