Electric field dependency of dielectric behavior of thermally sprayed ceramic coatings

M. Niittymäki, K. Lahti, T. Suhonen, J. Metsäjoki

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

    4 Citations (Scopus)

    Abstract

    High temperature applications e.g. fuel cells require ceramic based insulation solutions instead of polymers. The aim of this paper was to characterize the dielectric properties of thermally sprayed ceramic coatings; especially the electric field dependency of AC and DC behavior of thermally sprayed ceramic coatings. One of the spinel samples and one of the alumina samples have quite similar lamellar microstructure which may partly explain their similar type of behavior in DC resistivity as well as in AC loss indexes at low frequencies. These two samples had smaller lamellar size than the other alumina and spinel samples which also had quite similar behavior of AC losses at low frequencies, respectively. In addition to the lamellar size and structure, also micro cracks in the coating microstructure are proposed to have an effect on the dielectric behavior and its electric field dependency.
    Original languageEnglish
    Title of host publication2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM)
    PublisherIEEE Institute of Electrical and Electronic Engineers
    Pages500-503
    ISBN (Electronic)978-1-4799-8903-4, 978-1-4799-8902-7
    DOIs
    Publication statusPublished - 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

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    Keywords

    • alumina
    • breakdown
    • ceramic
    • coating
    • dc conductivity
    • dielectric spectroscopy
    • HVOF
    • loss index
    • resistivity
    • spinel
    • thermal spraying
    • ProperPart
    • ProperTune

    Cite this

    Niittymäki, M., Lahti, K., Suhonen, T., & Metsäjoki, J. (2015). Electric field dependency of dielectric behavior of thermally sprayed ceramic coatings. In 2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM) (pp. 500-503). IEEE Institute of Electrical and Electronic Engineers . https://doi.org/10.1109/ICPADM.2015.7295318