Development of Ba-hexaferrite coatings for electromagnetic wave absorption applications

K. Bobzin, T. Schlaefer, M. Bégard, M. Bruehl (Corresponding Author), G. Bolelli, L. Lusvarghi, D. Lisjak, Arto Hujanen, Pertti Lintunen, Ulla Kanerva, Tommi Varis, M. Pasquale

    Research output: Contribution to journalArticleScientificpeer-review

    16 Citations (Scopus)

    Abstract

    In this research, Ba-hexaferrite coatings for electromagnetic wave absorption applications were deposited by thermal spraying. A suitable powder feedstock was manufactured by blending a BaCO3 + Fe2O3 mixture, which was then agglomerated by spray-drying. The agglomerates were processed by air plasma spraying (APS) without any further treatment or were heat-treated and reactively-sintered to stoichiometric Ba-hexaferrite prior to spraying. As-sprayed coatings were analyzed by Raman spectroscopy and X-ray diffraction (XRD). Whereas the deposition of untreated agglomerates did not result in adequate amounts of crystalline Ba-hexaferrite in the coatings, the APS processing of reactively-sintered agglomerates led to a high content of Ba-hexaferrite and similar magnetic properties to those of Ba-hexaferrite bulk materials.
    Original languageEnglish
    Pages (from-to)1015-1020
    Number of pages6
    JournalSurface and Coatings Technology
    Volume205
    Issue number4
    DOIs
    Publication statusPublished - 2010
    MoE publication typeA1 Journal article-refereed
    Event4th Workshop RIPT (Les Rencontres Internationales sur la Projection Thermique) - Lille, France
    Duration: 2 Dec 20094 Dec 2009

    Keywords

    • APS spraying
    • Ba-hexaferrite coatings
    • Electromagnetic properties
    • Micro-Raman spectroscopy
    • Vibrating sample magnetometer
    • X-ray diffraction

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  • Cite this

    Bobzin, K., Schlaefer, T., Bégard, M., Bruehl, M., Bolelli, G., Lusvarghi, L., Lisjak, D., Hujanen, A., Lintunen, P., Kanerva, U., Varis, T., & Pasquale, M. (2010). Development of Ba-hexaferrite coatings for electromagnetic wave absorption applications. Surface and Coatings Technology, 205(4), 1015-1020. https://doi.org/10.1016/j.surfcoat.2010.03.060