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Structure and electrical properties of yttrium oxide sprayed by plasma torches from powders and suspensions
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SYSNO ASEP 0555222 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Structure and electrical properties of yttrium oxide sprayed by plasma torches from powders and suspensions Author(s) Ctibor, Pavel (UFP-V) RID, ORCID
Sedláček, J. (CZ)
Mušálek, Radek (UFP-V) RID, ORCID
Tesař, Tomáš (UFP-V) ORCID
Lukáč, František (UFP-V) ORCIDNumber of authors 5 Source Title Ceramics International. - : Elsevier - ISSN 0272-8842
Roč. 48, č. 6 (2022), s. 7464-7474Number of pages 11 s. Language eng - English Country GB - United Kingdom Keywords Dielectrics ; Plasma spraying ; Reflectance ; Thick films ; Yttrium oxide Subject RIV JP - Industrial Processing OECD category Materials engineering R&D Projects GA19-10246S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UFP-V - RVO:61389021 UT WOS 000760311400003 EID SCOPUS 85120832833 DOI 10.1016/j.ceramint.2021.11.291 Annotation Yttrium oxide was sprayed by a plasma torch using a coarse thermal spray powder, which must be in size range of tens of micrometers to ensure good penetration into the plasma stream. Thick coatings on steel substrates were produced with two sprays systems facilitating gas stabilized plasma (GSP) and hybrid water-argon stabilized plasma (WSP–H) techniques. Additionally, an ultra-fine yttrium oxide powder was sprayed from a suspension. Hybrid water-argon stabilized plasma system was used for this purpose. Markedly thinner compact coatings were produced this way. All three sorts of plasma sprayed deposits were studied by the same methods. Dielectric properties were studied in a broad range of frequencies and temperatures. The microstructure aspects as well as crystallite size were analyzed and discussed in relation to electrical properties. All coatings exhibited stable dielectric parameters versus changing frequency and temperature, comparable with literature values for various samples. Concerning sintered bulks, and especially their thermal stability of capacitance, the plasma sprayed coatings were slightly worse. However due to shape and size variability of the plasma spraying are yttria coatings prospective for technical applications. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2022 Electronic address https://www.sciencedirect.com/science/article/pii/S0272884221037147?via%3Dihub
Number of the records: 1