Tantalum oxide dielectrics processed with spark-plasma sintering

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F20%3A00531224" target="_blank" >RIV/61389021:_____/20:00531224 - isvavai.cz</a>
Result on the web
<a href="http://mit.imt.si/izvodi/mit202/ctibor.pdf" target="_blank" >http://mit.imt.si/izvodi/mit202/ctibor.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.17222/MIT.2019.074" target="_blank" >10.17222/MIT.2019.074</a>

Result language
angličtina
Original language name
Tantalum oxide dielectrics processed with spark-plasma sintering
Original language description
Tantalum pentoxide (Ta2O5) was sintered with spark-plasma sintering (SPS) using a commercial powder with micometric particles composed of nanometric crystallites. The influence of the SPS process and subsequent annealing on the microstructure, phase composition and dielectric properties was studied. After the sintering, the product was oxygen deficient because of the low pressure in the sintering chamber. Evacuation was necessary for the process because of the carbon pistons and carbon die used for the powder compaction. After the subsequent annealing in air, the white color of Ta2O5 was restored, being a proper indication of a re-oxidation. Dielectric properties were studied in a broad range of frequencies and temperatures. As-sintered and also annealed samples exhibited a high relative permittivity in a range of 61-68, a loss factor of about 0.001 and a resistivity in the order of 1011 Ωm.
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
—
OECD FORD branch
20501 - Materials engineering

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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