Dielectric properties and vacancy-like defects in plasma-sprayed barium titanate.

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F17%3A00476054" target="_blank" >RIV/61389021:_____/17:00476054 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/17:10369076 RIV/68407700:21230/17:00315133
Result on the web
<a href="http://dx.doi.org/10.1111/jace.14840" target="_blank" >http://dx.doi.org/10.1111/jace.14840</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1111/jace.14840" target="_blank" >10.1111/jace.14840</a>

Result language
angličtina
Original language name
Dielectric properties and vacancy-like defects in plasma-sprayed barium titanate.
Original language description
Positron annihilation spectroscopy was employed for investigation of vacancy-like defects in plasma-sprayed barium titanate. Defect studies were combined with measurement of dielectric properties of barium titanate coatings. Samples prepared by gas-stabilized plasma spray (GSP) torch and by plasma torch with the hybrid water-argon stabilization (WSP-H) were studied. Processing parameters were selected so that GSP coatings were sprayed in reductive conditions, whereas WSP-H coatings were prepared in oxidizing environment. As-sprayed GSP coating is dark, whereas WSP-H one is light. The dielectric properties of WSP-H coating are superior to those for GSP one. Defect studies revealed that both GSP and WSP-H coatings contain titanium vacancies. However, GSP coating contains in addition a considerable concentration of oxygen vacancies. Some fraction of oxygen vacancies in GSP coating is coupled with titanium vacancies forming partial Schottky defect. The structure of WSP-H coating is less disordered and contains only a low concentration of oxygen vacancies. This is consistent with reductive and oxidizing conditions in GSP and WSP-H spraying, respectively.Annealing at elevated temperatures in air leads to removal of oxygen vacancies which are filled by oxygen diffusing into the samples.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20504 - Ceramics

Project
<a href="/en/project/GBP108%2F12%2FG043" target="_blank" >GBP108/12/G043: Interface controlled properties of micro/nanocrystalline materials for advanced structural applications, biodegradable implants and hydrogen storage</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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