DC ramp rate effect on the breakdown response of SiO2-BOPP nanocomposites

Ilkka Rytöluoto, Mikael Ritamäki, Kari Lahti, Mikko Karttunen

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    5 Citations (Scopus)

    Abstract

    The effect of voltage ramp rate on the short-term dielectric breakdown strength of polymer nanocomposites is not well-documented. In this paper, the effect of DC field ramp rate on the large-area breakdown performance of melt-extruded bi-axially oriented polypropylene (BOPP) films incorporating 4.5 wt-% of nano-silica is studied. By utilizing a self-healing multi-breakdown measurement method with a variable DC voltage ramp rate, a statistically large amount of breakdown data was obtained from a large total sample film area as a function of DC field ramp rate (0.1-50 Vs-1μm-1)). With a decreasing ramp rate, Weibull statistical analysis of the breakdown data suggests a systematically decreasing trend in the breakdown strength (Weibull α) and an increase in the Weibull shape parameter of time (>1) for the nanocomposite. The observed behavior is speculated to be attributable to highly altered internal charge dynamics of the silica-BOPP nanocomposite. The results exemplify the importance of careful breakdown strength assessment when dielectric films of more complex internal structure are studied.
    Original languageEnglish
    Title of host publicationProperties and Applications of Dielectric Materials (ICPADM), 2015 IEEE 11th International Conference on the
    PublisherIEEE Institute of Electrical and Electronic Engineers
    Pages496-499
    ISBN (Electronic)978-1-4799-8903-4, 978-1-4799-8902-7
    DOIs
    Publication statusPublished - 15 Oct 2015
    MoE publication typeA4 Article in a conference publication
    EventIEEE 11th International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2015 - Sydney, Australia
    Duration: 19 Jul 201522 Jul 2015
    Conference number: 11

    Conference

    ConferenceIEEE 11th International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2015
    Abbreviated titleICPADM 2015
    CountryAustralia
    CitySydney
    Period19/07/1522/07/15

    Keywords

    • BOPP
    • silica
    • nanocomposite
    • breakdown
    • ramp rate dependence
    • weibull

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