Stability Study of Dielectric Properties of Plasma-Sprayed BaTiO3

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F22%3A00556549" target="_blank" >RIV/61389021:_____/22:00556549 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21220/22:00357710 RIV/68407700:21230/22:00357710

Výsledek na webu

<a href="https://www.mdpi.com/2079-6412/12/3/355" target="_blank" >https://www.mdpi.com/2079-6412/12/3/355</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/coatings12030355" target="_blank" >10.3390/coatings12030355</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Stability Study of Dielectric Properties of Plasma-Sprayed BaTiO3

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Stability Study of Dielectric Properties of Plasma-Sprayed BaTiO3

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Coatings

ISSN

2079-6412

e-ISSN

2079-6412

Svazek periodika

12

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

15

Strana od-do

355

Kód UT WoS článku

000775744400001

EID výsledku v databázi Scopus

2-s2.0-85126578500