Broadband dielectric and conductivity spectra of dielectric - metal nanocomposites for microwave applications

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F13%3A00423078" target="_blank" >RIV/68378271:_____/13:00423078 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Broadband dielectric and conductivity spectra of dielectric - metal nanocomposites for microwave applications

Popis výsledku v původním jazyce

Three kinds of dielectric-metal nanocomposites were prepared and studied: epoxy resin-xFe (x = 0-30 vol.%; b) epoxy resin-xNi (x = 0-40 vol.%); c) paraffin-xFe (x = 10-60 vol.%). Their dielectric and ac conductivity spectra were measured in a broad frequency range from 10^(-2) Hz to 10^(10) Hz. Dielectric/conductivity dispersion was observed in the whole frequency range. Increase of the metal content results in the increase of the composite dielectric permittivity, loss and conductivity in the whole frequency range. The power-law dispersion of conductivity and permittivity characterizes response in the microwave range for all studied composites. For the compositions with high metal content, above the percolation threshold, the conductivity plateau screens the power-law dispersion at low frequencies. Three contributing polarization/conductivity mechanisms are considered, possibilities of the composites microwave applications are discussed.

Název v anglickém jazyce

Broadband dielectric and conductivity spectra of dielectric - metal nanocomposites for microwave applications

Popis výsledku anglicky

Three kinds of dielectric-metal nanocomposites were prepared and studied: epoxy resin-xFe (x = 0-30 vol.%; b) epoxy resin-xNi (x = 0-40 vol.%); c) paraffin-xFe (x = 10-60 vol.%). Their dielectric and ac conductivity spectra were measured in a broad frequency range from 10^(-2) Hz to 10^(10) Hz. Dielectric/conductivity dispersion was observed in the whole frequency range. Increase of the metal content results in the increase of the composite dielectric permittivity, loss and conductivity in the whole frequency range. The power-law dispersion of conductivity and permittivity characterizes response in the microwave range for all studied composites. For the compositions with high metal content, above the percolation threshold, the conductivity plateau screens the power-law dispersion at low frequencies. Three contributing polarization/conductivity mechanisms are considered, possibilities of the composites microwave applications are discussed.

Druh

D - Stať ve sborníku

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

<a href="/cs/project/GAP204%2F12%2F0232" target="_blank" >GAP204/12/0232: Dielektrická a fononová spektroskopie nanokompozitních dielektrik a vodičů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

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

Název statě ve sborníku

2013 IEEE 33rd International Scientific Conference Electronics and Nanotechnology (ELNANO)

ISBN

978-1-4673-4672-6

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

21-24

Název nakladatele

IEEE

Místo vydání

New York

Místo konání akce

Kyiv

Datum konání akce

16. 4. 2013

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000325186800002