High field light emission in LDPE/MgO nanocomposite

Toshikatsu Tanaka*, Kanan Yokoyama, Yoshimichi Ohki, Yoshinao Murata, Yoitsu Sekiguchi, Manabu Goshowaki

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

12 Citations (Scopus)


This paper deals with initiation of light emission and electrical trees in LDPE/MgO nanocomposite. Specimens were prepared in such a way that a tungsten needle of 50 μm φ and 1μmR was inserted into dielectrics with a spacing of 0.4 mm between high voltage and ground. Light emission was observed by an ICCD camera, and tree shapes were examined by an optical microscope. As a result, it was found that light emission originates from electrical trees rather than electroluminescence in our experiments and that initiation of electrical trees and light emission are affected by the addition of nano MgO fillers. That is, it was clarified that applied voltage or electric stress for tree initiation tends to increase, as filler content increases in the range of 0 to 1 phr. In addition, tree length is shortened due to inclusion of nano-fillers.

Original languageEnglish
Number of pages4
Publication statusPublished - 2008 Dec 31
Event2008 International Symposium on Electrical Insulating Materials, ISEIM 2008 - Yokkaichi, Japan
Duration: 2008 Sept 72008 Sept 11


Conference2008 International Symposium on Electrical Insulating Materials, ISEIM 2008

ASJC Scopus subject areas

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


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