DIELECTRIC BREAKDOWN CHARACTERISTICS OF POLYTETRAFLUOROETHYLENE FILMS MADE BY HOT-ROLLING.

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

    Abstract

    Impulse breakdown characteristics of polytetrafluoroethylene films have been studied using original sheet-films (U-film), films rolled at elevated temperature (R-film), and films elongated uniaxially (E-film). The R-film shows the highest breakdown strength which is independent of temperature and decreases with increase in the sample thickness. The suggests that the breakdown is due to electron avalanche process. Conductivity of the R-film is lower than that of the U-film. Observation by SEM shows that hot-rolling extinguishes voids where electrons can be accelerated easily. This extinction of voids and decrease in conductivity are thought to bring the highest breakdown strength to the R-film.

    Original languageEnglish
    Title of host publicationProceedings of the Symposium on Electrical Insulating Materials
    Place of PublicationJpn
    PublisherInst of Electrical Engineers of Japan
    Pages177-180
    Number of pages4
    Publication statusPublished - 1986

    Fingerprint

    Hot rolling
    Electric breakdown
    Polytetrafluoroethylenes
    Electrons
    Temperature
    Scanning electron microscopy

    ASJC Scopus subject areas

    • Engineering(all)

    Cite this

    Ohki, Y., & Iida, S. (1986). DIELECTRIC BREAKDOWN CHARACTERISTICS OF POLYTETRAFLUOROETHYLENE FILMS MADE BY HOT-ROLLING. In Proceedings of the Symposium on Electrical Insulating Materials (pp. 177-180). Jpn: Inst of Electrical Engineers of Japan.

    DIELECTRIC BREAKDOWN CHARACTERISTICS OF POLYTETRAFLUOROETHYLENE FILMS MADE BY HOT-ROLLING. / Ohki, Yoshimichi; Iida, S.

    Proceedings of the Symposium on Electrical Insulating Materials. Jpn : Inst of Electrical Engineers of Japan, 1986. p. 177-180.

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

    Ohki, Y & Iida, S 1986, DIELECTRIC BREAKDOWN CHARACTERISTICS OF POLYTETRAFLUOROETHYLENE FILMS MADE BY HOT-ROLLING. in Proceedings of the Symposium on Electrical Insulating Materials. Inst of Electrical Engineers of Japan, Jpn, pp. 177-180.
    Ohki Y, Iida S. DIELECTRIC BREAKDOWN CHARACTERISTICS OF POLYTETRAFLUOROETHYLENE FILMS MADE BY HOT-ROLLING. In Proceedings of the Symposium on Electrical Insulating Materials. Jpn: Inst of Electrical Engineers of Japan. 1986. p. 177-180
    Ohki, Yoshimichi ; Iida, S. / DIELECTRIC BREAKDOWN CHARACTERISTICS OF POLYTETRAFLUOROETHYLENE FILMS MADE BY HOT-ROLLING. Proceedings of the Symposium on Electrical Insulating Materials. Jpn : Inst of Electrical Engineers of Japan, 1986. pp. 177-180
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    abstract = "Impulse breakdown characteristics of polytetrafluoroethylene films have been studied using original sheet-films (U-film), films rolled at elevated temperature (R-film), and films elongated uniaxially (E-film). The R-film shows the highest breakdown strength which is independent of temperature and decreases with increase in the sample thickness. The suggests that the breakdown is due to electron avalanche process. Conductivity of the R-film is lower than that of the U-film. Observation by SEM shows that hot-rolling extinguishes voids where electrons can be accelerated easily. This extinction of voids and decrease in conductivity are thought to bring the highest breakdown strength to the R-film.",
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