Space charge distributions in two-layered LDPE/MgO nanocomposites exhibiting superior insulation performance

Etsu Kanegae, Kazuyuki Ishimoto, Toshikatsu Tanaka, Yoshimichi Ohki, Yoitsu Sekiguchi, Yoshinao Murata, Chandupatla Chakradhar Reddy

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Recently polymer nanocomposite has been attracting much attention as an emerging insulating material. In this paper, we measured space charge distributions for two-layered dielectric films consisting of certain combination of low-density polyethylene (LDPE) and its nanocomposite with magnesia nano-fillers during the application of dc electric field of 25 kV/mm or 100 kV/mm. Both at room temperature and 50 °C, space charge is formed at the interface of two different materials to maintain the continuity of current when the electric field is 25 kV/mm, while packet-like charge appears only in the LDPE when the electric field is 100 kV/mm. These phenomena are explained by assuming that the nano-fillers effectively suppress the increase in conductivity induced by the high electric field.

Original languageEnglish
Pages (from-to)349-354+9
JournalIEEJ Transactions on Fundamentals and Materials
Volume130
Issue number4
Publication statusPublished - 2010 Jun 21

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Keywords

  • Conduction current
  • Insulating materials
  • Low-density polyethylene
  • Polymer nanocomposite
  • Space charge
  • Two-layered dielectrics

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Kanegae, E., Ishimoto, K., Tanaka, T., Ohki, Y., Sekiguchi, Y., Murata, Y., & Reddy, C. C. (2010). Space charge distributions in two-layered LDPE/MgO nanocomposites exhibiting superior insulation performance. IEEJ Transactions on Fundamentals and Materials, 130(4), 349-354+9.