Enhanced performance of tree initiation V-t characteristics of epoxy/clay nanocomposite in comparison with neat epoxy resin

S. Raetzke, Y. Ohki, T. Imai, J. Kindersberger, T. Tanaka

研究成果: Conference contribution

12 引用 (Scopus)

抜粋

Tree initiation behavior of an epoxy nanocomposite with 5 wt % nanoclay (layered silicate) was investigated in comparison to neat epoxy resin without fillers. To shorten the time for experiments, 600 Hz was used instead of 60 Hz, as acceleration for tree initiation had been confirmed at 10 kVrms and 14 kVrras between the two frequencies. V-t characteristics for tree initiation rather than tree growth to bridge the electrodes were obtained for conventional type of treeing specimens with an embedded steel needle subjected to voltages from 2 kVrms to 14 kVrms. As a result, the n value in V-n = t characteristics was confirmed to be 5.5 for neat epoxy and larger than 7 for nanocomposite. It was clarified that tree initiation V-t characteristics were improved by approximately one order of magnitude for the epoxy/nanoclay composite compared to the neat epoxy resin. To be precise, such an enhancement factor is one order at high field but even two orders at low field. Formed trees are field dependent. They are rather thick and short in shape at low field, but thin and long at high field. It is concluded from the analysis on the basis of interfacial models and other studies that initial trees are formed due to a PD erosion process at low field during a long time, but due to dielectric breakdown including charge trapping at high field for a short time.

元の言語English
ホスト出版物のタイトル2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2008
ページ528-531
ページ数4
DOI
出版物ステータスPublished - 2008 12 1
イベント2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2008 - Quebec City, QC, Canada
継続期間: 2008 10 262008 10 29

出版物シリーズ

名前Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
ISSN(印刷物)0084-9162

Conference

Conference2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2008
Canada
Quebec City, QC
期間08/10/2608/10/29

    フィンガープリント

ASJC Scopus subject areas

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

これを引用

Raetzke, S., Ohki, Y., Imai, T., Kindersberger, J., & Tanaka, T. (2008). Enhanced performance of tree initiation V-t characteristics of epoxy/clay nanocomposite in comparison with neat epoxy resin. : 2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2008 (pp. 528-531). [4772803] (Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP). https://doi.org/10.1109/CEIDP.2008.4772803