Dielectric properties of HVOF sprayed ceramic coatings

M. Niittymäki, Tomi Suhonen, Ulla Kanerva, Jarkko Metsäjoki, K. Lahti

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

    4 Citations (Scopus)

    Abstract

    Thermally sprayed ceramic coatings can be used as electrical insulators for example in high temperature applications (e.g. fuel cells) or in other demanding conditions. In electrical insulation applications the mostly used coating materials are aluminum oxide, magnesium oxide and magnesium aluminate. In general, only few reports of dielectric properties of thermally sprayed ceramic coatings can be found in literature and further analysis is thus needed. In addition, the measurement methods and conditions in previous research are often not fully documented, complicating the evaluation and comparison of the properties of different coatings. The aim of this paper was to characterize dielectric properties of thermally sprayed ceramic spinel coating sprayed with high-velocity oxygen fuel (HVOF) technique. The studied dielectric properties are DC resistivity, DC dielectric breakdown strength, as well as permittivity and dielectric losses at different frequencies. All measurements were made at temperature of 20 °C and at relative humidity of 20 %. Dielectric properties and the composition of coating material are presented and analyzed.
    Original languageEnglish
    Title of host publicationProceedings
    Subtitle of host publicationIEEE International Conference on Solid Dielectrics, ICSD 2013
    PublisherIEEE Institute of Electrical and Electronic Engineers
    Pages389-392
    ISBN (Electronic)978-1-4673-4461-6
    ISBN (Print)978-1-4799-0807-3
    DOIs
    Publication statusPublished - 2013
    MoE publication typeNot Eligible
    Event11th IEEE International Conference on Solid Dielectrics, ICSD 2013 - Bologna, Italy
    Duration: 30 Jun 20134 Jul 2013

    Conference

    Conference11th IEEE International Conference on Solid Dielectrics, ICSD 2013
    Abbreviated titleICSD 2013
    CountryItaly
    CityBologna
    Period30/06/134/07/13

    Keywords

    • thermal spraying
    • HVOF
    • spinel
    • coating
    • resistivity
    • dielectric spectroscopy
    • dielectric breakdown strenght
    • ProperTune

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  • Cite this

    Niittymäki, M., Suhonen, T., Kanerva, U., Metsäjoki, J., & Lahti, K. (2013). Dielectric properties of HVOF sprayed ceramic coatings. In Proceedings: IEEE International Conference on Solid Dielectrics, ICSD 2013 (pp. 389-392). IEEE Institute of Electrical and Electronic Engineers. https://doi.org/10.1109/ICSD.2013.6619769