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Dielectric permittivity model for polymer-filler composite materials by the example of Ni- and graphite-filled composites for high-frequency absorbing coatings

 
: Prokopchuk, Artem; Zozulia, Ivan; Didenko, Yurii; Tatarchuk, Dmytro; Heuer, Henning; Poplavko, Yuriy

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Fulltext ()

Coatings 11 (2021), No.2, Art. 172, 20 pp.
ISSN: 2079-6412
Deutsche Forschungsgemeinschaft DFG
419162977
Research on Inner Polar Phase Effects for High Frequency Absorbing Materials
English
Journal Article, Electronic Publication
Fraunhofer IKTS ()
absorbing materials; polar dielectrics; internal polar phase; electromagnetic interference; polymer matrix; absorbing shielding; graphite

Abstract
The suppression of unnecessary radio-electronic noise and the protection of electronic devices from electromagnetic interference by the use of pliable highly microwave radiation absorbing composite materials based on polymers or rubbers filled with conductive and magnetic fillers have been proposed. Since the working frequency bands of electronic devices and systems are rapidly expanding up to the millimeter wave range, the capabilities of absorbing and shielding composites should be evaluated for increasing operating frequency. The point is that the absorption capacity of conductive and magnetic fillers essentially decreases as the frequency increases. Therefore, this paper is devoted to the absorbing capabilities of composites filled with high-loss dielectric fillers, in which absorption significantly increases as frequency rises, and it is possible to achieve the maximum frequency selective of absorption due to electromagnetic and electromechanical resonances.

: http://publica.fraunhofer.de/documents/N-633090.html