Dielectric Characteristics and Microwave Absorption of Graphene Composite MaterialsReportar como inadecuado


Dielectric Characteristics and Microwave Absorption of Graphene Composite Materials


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DCNS Research Technocampus Océan, 5 rue de l’Halbrane, 44340 Bouguenais, France

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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 and 263 avenue du Général Leclerc, 35042 Rennes, France





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Author to whom correspondence should be addressed.



Academic Editors: Juergen Stampfl and Arne Berner

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





Autor: Kevin Rubrice 1,2,* , Xavier Castel 2, Mohamed Himdi 2 and Patrick Parneix 1

Fuente: http://mdpi.com/



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