Počet záznamů: 1
Structure and electrical properties of yttrium oxide sprayed by plasma torches from powders and suspensions
- 1.0555222 - ÚFP 2022 RIV GB eng J - Článek v odborném periodiku
Ctibor, Pavel - Sedláček, J. - Mušálek, Radek - Tesař, Tomáš - Lukáč, František
Structure and electrical properties of yttrium oxide sprayed by plasma torches from powders and suspensions.
Ceramics International. Roč. 48, č. 6 (2022), s. 7464-7474. ISSN 0272-8842. E-ISSN 1873-3956
Grant CEP: GA ČR(CZ) GA19-10246S
Institucionální podpora: RVO:61389021
Klíčová slova: Dielectrics * Plasma spraying * Reflectance * Thick films * Yttrium oxide
Obor OECD: Materials engineering
Impakt faktor: 5.2, rok: 2022
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S0272884221037147?via%3Dihub
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.
Trvalý link: http://hdl.handle.net/11104/0329780
Počet záznamů: 1