Enhanced performance of tree initiation V-t characteristics of epoxy/clay nanocomposite in comparison with neat epoxy resin

S. Raetzke, Yoshimichi Ohki, T. Imai, J. Kindersberger, T. Tanaka

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

    12 Citations (Scopus)

    Abstract

    Tree initiation behavior of an epoxy nanocomposite with 5 wt % nanoclay (layered silicate) was investigated in comparison to neat epoxy resin without fillers. To shorten the time for experiments, 600 Hz was used instead of 60 Hz, as acceleration for tree initiation had been confirmed at 10 kVrms and 14 kVrras between the two frequencies. V-t characteristics for tree initiation rather than tree growth to bridge the electrodes were obtained for conventional type of treeing specimens with an embedded steel needle subjected to voltages from 2 kVrms to 14 kVrms. As a result, the n value in V-n = t characteristics was confirmed to be 5.5 for neat epoxy and larger than 7 for nanocomposite. It was clarified that tree initiation V-t characteristics were improved by approximately one order of magnitude for the epoxy/nanoclay composite compared to the neat epoxy resin. To be precise, such an enhancement factor is one order at high field but even two orders at low field. Formed trees are field dependent. They are rather thick and short in shape at low field, but thin and long at high field. It is concluded from the analysis on the basis of interfacial models and other studies that initial trees are formed due to a PD erosion process at low field during a long time, but due to dielectric breakdown including charge trapping at high field for a short time.

    Original languageEnglish
    Title of host publicationAnnual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
    Pages528-531
    Number of pages4
    DOIs
    Publication statusPublished - 2008
    Event2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2008 - Quebec City, QC
    Duration: 2008 Oct 262008 Oct 29

    Other

    Other2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2008
    CityQuebec City, QC
    Period08/10/2608/10/29

    Fingerprint

    Epoxy Resins
    Epoxy resins
    Nanocomposites
    Clay
    Silicates
    Charge trapping
    Steel
    Electric breakdown
    Needles
    Fillers
    Erosion
    Electrodes
    Composite materials
    Electric potential
    Experiments
    clay

    ASJC Scopus subject areas

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

    Cite this

    Raetzke, S., Ohki, Y., Imai, T., Kindersberger, J., & Tanaka, T. (2008). Enhanced performance of tree initiation V-t characteristics of epoxy/clay nanocomposite in comparison with neat epoxy resin. In Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP (pp. 528-531). [4772803] https://doi.org/10.1109/CEIDP.2008.4772803

    Enhanced performance of tree initiation V-t characteristics of epoxy/clay nanocomposite in comparison with neat epoxy resin. / Raetzke, S.; Ohki, Yoshimichi; Imai, T.; Kindersberger, J.; Tanaka, T.

    Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. 2008. p. 528-531 4772803.

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

    Raetzke, S, Ohki, Y, Imai, T, Kindersberger, J & Tanaka, T 2008, Enhanced performance of tree initiation V-t characteristics of epoxy/clay nanocomposite in comparison with neat epoxy resin. in Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP., 4772803, pp. 528-531, 2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2008, Quebec City, QC, 08/10/26. https://doi.org/10.1109/CEIDP.2008.4772803
    Raetzke S, Ohki Y, Imai T, Kindersberger J, Tanaka T. Enhanced performance of tree initiation V-t characteristics of epoxy/clay nanocomposite in comparison with neat epoxy resin. In Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. 2008. p. 528-531. 4772803 https://doi.org/10.1109/CEIDP.2008.4772803
    Raetzke, S. ; Ohki, Yoshimichi ; Imai, T. ; Kindersberger, J. ; Tanaka, T. / Enhanced performance of tree initiation V-t characteristics of epoxy/clay nanocomposite in comparison with neat epoxy resin. Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP. 2008. pp. 528-531
    @inproceedings{35167bc45a0c43fd931017b40d47a07d,
    title = "Enhanced performance of tree initiation V-t characteristics of epoxy/clay nanocomposite in comparison with neat epoxy resin",
    abstract = "Tree initiation behavior of an epoxy nanocomposite with 5 wt {\%} nanoclay (layered silicate) was investigated in comparison to neat epoxy resin without fillers. To shorten the time for experiments, 600 Hz was used instead of 60 Hz, as acceleration for tree initiation had been confirmed at 10 kVrms and 14 kVrras between the two frequencies. V-t characteristics for tree initiation rather than tree growth to bridge the electrodes were obtained for conventional type of treeing specimens with an embedded steel needle subjected to voltages from 2 kVrms to 14 kVrms. As a result, the n value in V-n = t characteristics was confirmed to be 5.5 for neat epoxy and larger than 7 for nanocomposite. It was clarified that tree initiation V-t characteristics were improved by approximately one order of magnitude for the epoxy/nanoclay composite compared to the neat epoxy resin. To be precise, such an enhancement factor is one order at high field but even two orders at low field. Formed trees are field dependent. They are rather thick and short in shape at low field, but thin and long at high field. It is concluded from the analysis on the basis of interfacial models and other studies that initial trees are formed due to a PD erosion process at low field during a long time, but due to dielectric breakdown including charge trapping at high field for a short time.",
    author = "S. Raetzke and Yoshimichi Ohki and T. Imai and J. Kindersberger and T. Tanaka",
    year = "2008",
    doi = "10.1109/CEIDP.2008.4772803",
    language = "English",
    isbn = "9781424425495",
    pages = "528--531",
    booktitle = "Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP",

    }

    TY - GEN

    T1 - Enhanced performance of tree initiation V-t characteristics of epoxy/clay nanocomposite in comparison with neat epoxy resin

    AU - Raetzke, S.

    AU - Ohki, Yoshimichi

    AU - Imai, T.

    AU - Kindersberger, J.

    AU - Tanaka, T.

    PY - 2008

    Y1 - 2008

    N2 - Tree initiation behavior of an epoxy nanocomposite with 5 wt % nanoclay (layered silicate) was investigated in comparison to neat epoxy resin without fillers. To shorten the time for experiments, 600 Hz was used instead of 60 Hz, as acceleration for tree initiation had been confirmed at 10 kVrms and 14 kVrras between the two frequencies. V-t characteristics for tree initiation rather than tree growth to bridge the electrodes were obtained for conventional type of treeing specimens with an embedded steel needle subjected to voltages from 2 kVrms to 14 kVrms. As a result, the n value in V-n = t characteristics was confirmed to be 5.5 for neat epoxy and larger than 7 for nanocomposite. It was clarified that tree initiation V-t characteristics were improved by approximately one order of magnitude for the epoxy/nanoclay composite compared to the neat epoxy resin. To be precise, such an enhancement factor is one order at high field but even two orders at low field. Formed trees are field dependent. They are rather thick and short in shape at low field, but thin and long at high field. It is concluded from the analysis on the basis of interfacial models and other studies that initial trees are formed due to a PD erosion process at low field during a long time, but due to dielectric breakdown including charge trapping at high field for a short time.

    AB - Tree initiation behavior of an epoxy nanocomposite with 5 wt % nanoclay (layered silicate) was investigated in comparison to neat epoxy resin without fillers. To shorten the time for experiments, 600 Hz was used instead of 60 Hz, as acceleration for tree initiation had been confirmed at 10 kVrms and 14 kVrras between the two frequencies. V-t characteristics for tree initiation rather than tree growth to bridge the electrodes were obtained for conventional type of treeing specimens with an embedded steel needle subjected to voltages from 2 kVrms to 14 kVrms. As a result, the n value in V-n = t characteristics was confirmed to be 5.5 for neat epoxy and larger than 7 for nanocomposite. It was clarified that tree initiation V-t characteristics were improved by approximately one order of magnitude for the epoxy/nanoclay composite compared to the neat epoxy resin. To be precise, such an enhancement factor is one order at high field but even two orders at low field. Formed trees are field dependent. They are rather thick and short in shape at low field, but thin and long at high field. It is concluded from the analysis on the basis of interfacial models and other studies that initial trees are formed due to a PD erosion process at low field during a long time, but due to dielectric breakdown including charge trapping at high field for a short time.

    UR - http://www.scopus.com/inward/record.url?scp=65949116373&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=65949116373&partnerID=8YFLogxK

    U2 - 10.1109/CEIDP.2008.4772803

    DO - 10.1109/CEIDP.2008.4772803

    M3 - Conference contribution

    AN - SCOPUS:65949116373

    SN - 9781424425495

    SP - 528

    EP - 531

    BT - Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP

    ER -