Počet záznamů: 1
Stability Study of Dielectric Properties of Plasma-Sprayed BaTiO3
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SYSNO ASEP 0556549 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Stability Study of Dielectric Properties of Plasma-Sprayed BaTiO3 Tvůrce(i) Ctibor, Pavel (UFP-V) RID, ORCID
Straka, L. (CZ)
Lukáč, František (UFP-V) ORCID
Sedláček, J. (CZ)Celkový počet autorů 4 Číslo článku 355 Zdroj.dok. Coatings. - : MDPI
Roč. 12, č. 3 (2022)Poč.str. 15 s. Jazyk dok. eng - angličtina Země vyd. CH - Švýcarsko Klíč. slova barium-titanate ; temperature stability ; spectroscopy ; ceramics ; plasma spraying ; electrical properties ; dielectric ceramics ; annealing Vědní obor RIV JP - Průmyslové procesy a zpracování Obor OECD Materials engineering Způsob publikování Open access Institucionální podpora UFP-V - RVO:61389021 UT WOS 000775744400001 EID SCOPUS 85126578500 DOI 10.3390/coatings12030355 Anotace Barium titanate coatings were, for the first time, sprayed by a high feed-rate plasma torch with water stabilization of the plasma. Two power levels of the torch were applied for spraying to cover steel substrates. Various substrate preheating levels from 125 degrees C to 377 degrees C were used to modify cooling conditions. Microstructure and phase composition including crystallinity quantification were observed. Dielectric measurements proved that the relative permittivity between 300 and 400 coatings is too temperature sensitive over 170 degrees C but fits the requirements of the EIA temperature coefficient between room temperature and 170 degrees C. Simultaneously, the loss tangent remains rather low, between 0.02 and 0.07, in a broad range of temperatures and frequencies. Annealing was performed in air to heal the oxygen deficiency, but only modified the microstructure insignificantly. The dielectric properties of as-sprayed and annealed samples were discussed, with the main finding that the temperature coefficient of permittivity was improved by annealing. This study contributes to the search for the suitability of plasma-sprayed BaTiO3 coatings for application in the electrical industry, namely by the optimization of conditions for high feed-rate spraying. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2023 Elektronická adresa https://www.mdpi.com/2079-6412/12/3/355
Počet záznamů: 1