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Electromagnetic losses in carbon–epoxy composites

✍ Scribed by Ludmila Matzui; Ludmila Vovchenko; Yuriy Prylutskyy; Igor Korotash; Volodymyr Matzui; Peter Eklund; Uwe Ritter; Peter Scharff

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
164 KB
Volume
27
Category
Article
ISSN
0928-4931

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✦ Synopsis

The electromagnetic losses in graphite-metal and carbon-epoxy composites (CM) at the frequency f ≈ 1.8 GHz have been investigated. Composite materials were prepared using different carbon particles such as natural disperse graphite (Gr) (size of flakes 50 μm), thermoexfoliated graphite (TEG), carbon fiber (CF) and impure carbon nanotubes (CN). The maximal microwave loss observed for Gr-epoxy CM at graphite content was about 45 wt.% (23 dB) and for TEG-epoxy CM at TEG content around 13 wt.% (26 dB). The comparative analysis of CM TEGepoxy, CF-epoxy and CN-epoxy containing almost the same content of carbon component (∼11-13 wt.%) have shown the electromagnetic losses to be maximal for CM TEG-epoxy and CF-epoxy.

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