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Materials 2016, 9(10), 825; doi:10.3390/ma9100825

Dielectric Characteristics and Microwave Absorption of Graphene Composite Materials

1
DCNS Research Technocampus Océan, 5 rue de l’Halbrane, 44340 Bouguenais, France
2
Institut d’Electronique et de Télécommunications de Rennes (IETR, UMR-6164)/Institut Universitaire de Technologie de Saint-Brieuc/Université de Rennes 1, 18 rue Henri Wallon, 22004 Saint-Brieuc & 263 avenue du Général Leclerc, 35042 Rennes, France
*
Author to whom correspondence should be addressed.
Academic Editors: Juergen Stampfl and Arne Berner
Received: 12 September 2016 / Revised: 27 September 2016 / Accepted: 2 October 2016 / Published: 13 October 2016
(This article belongs to the Special Issue Microwave Absorbing and Energy Storage Materials)
View Full-Text   |   Download PDF [4328 KB, uploaded 13 October 2016]   |  

Abstract

Nowadays, many types of materials are elaborated for microwave absorption applications. Carbon-based nanoparticles belong to these types of materials. Among these, graphene presents some distinctive features for electromagnetic radiation absorption and thus microwave isolation applications. In this paper, the dielectric characteristics and microwave absorption properties of epoxy resin loaded with graphene particles are presented from 2 GHz to 18 GHz. The influence of various parameters such as particle size (3 µm, 6–8 µm, and 15 µm) and weight ratio (from 5% to 25%) are presented, studied, and discussed. The sample loaded with the smallest graphene size (3 µm) and the highest weight ratio (25%) exhibits high loss tangent (tanδ = 0.36) and a middle dielectric constant ε′ = 12–14 in the 8–10 GHz frequency range. As expected, this sample also provides the highest absorption level: from 5 dB/cm at 4 GHz to 16 dB/cm at 18 GHz. View Full-Text
Keywords: multifunctional composite materials; graphene; physical properties; analytical modeling; electromagnetic absorption; complex dielectric constants multifunctional composite materials; graphene; physical properties; analytical modeling; electromagnetic absorption; complex dielectric constants
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Rubrice, K.; Castel, X.; Himdi, M.; Parneix, P. Dielectric Characteristics and Microwave Absorption of Graphene Composite Materials. Materials 2016, 9, 825.

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