Superiority of dielectric properties of LDPE/MgO nanocomposites over microcomposites

Kazuyuki Ishimoto, Etsu Kanegae, Yoshimichi Ohki, Toshikatsu Tanaka, Yoitsu Sekiguchi, Yoshinao Murata, C. C. Reddy

    Research output: Contribution to journalArticle

    65 Citations (Scopus)

    Abstract

    Dielectric properties were compared between two kinds of low-density polyethylene (LDPE) composites prepared by adding near spherical MgO fillers with different diameters of around several ten nm and several m. In the whole range of temperature from 0°C to 90°C, the conductivity is decreased and the permittivity is increased by the addition of fillers, irrespective of their sizes. However, the decrement in the conductivity is more significant and permittivity increment is suppressed more in the case of the nm fillers. In addition, a drastic increase in dielectric loss factor, observed at low frequencies, is suppressed more significantly by the addition of the nm fillers. While the formation of packet-like charge, observed in LDPE, is suppressed by both fillers, the effect is far more significant in the nanocomposites. This means that the nano-fillers suppress the conductivity enhancement by the voltage application more effectively.

    Original languageEnglish
    Article number5361597
    Pages (from-to)1735-1742
    Number of pages8
    JournalIEEE Transactions on Dielectrics and Electrical Insulation
    Volume16
    Issue number6
    DOIs
    Publication statusPublished - 2009 Dec

    Fingerprint

    Low density polyethylenes
    Dielectric properties
    Fillers
    Nanocomposites
    Permittivity
    Dielectric losses
    Composite materials
    Electric potential

    Keywords

    • Complex permittivity
    • Conductivity
    • Magnesium oxide
    • Polyethylene insulation
    • Polymer nanocomposites
    • Space charge distribution

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

    Cite this

    Superiority of dielectric properties of LDPE/MgO nanocomposites over microcomposites. / Ishimoto, Kazuyuki; Kanegae, Etsu; Ohki, Yoshimichi; Tanaka, Toshikatsu; Sekiguchi, Yoitsu; Murata, Yoshinao; Reddy, C. C.

    In: IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 16, No. 6, 5361597, 12.2009, p. 1735-1742.

    Research output: Contribution to journalArticle

    Ishimoto, Kazuyuki ; Kanegae, Etsu ; Ohki, Yoshimichi ; Tanaka, Toshikatsu ; Sekiguchi, Yoitsu ; Murata, Yoshinao ; Reddy, C. C. / Superiority of dielectric properties of LDPE/MgO nanocomposites over microcomposites. In: IEEE Transactions on Dielectrics and Electrical Insulation. 2009 ; Vol. 16, No. 6. pp. 1735-1742.
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