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Title: Enhanced microwave absorption performance of lightweight absorber based on reduced graphene oxide and Ag-coated hollow glass spheres/epoxy composite

Using a combination of Ag-coated hollow glass spheres (HGS@Ag) and a small quantity of graphene sheets within the epoxy matrix, we have prepared a novel lightweight high efficiency microwave absorption composite. Compared with pure HGS@Ag and graphene composite, the −10 dB absorption bandwidth and the minimum reflection loss of the novel composite are improved. Reflection loss exceeding −20 dB is obtained for composites in a wide frequency range and the minimum reflection loss reaches −46 dB while bandwidth less than −10 dB can reach up to 4.1 GHz when an appropriate absorber thickness between 2 and 3.5 mm is chosen. The enhanced microwave absorption performance of the novel composite is due to the enhanced dielectric response, enhanced conductivity, and the trap of electromagnetic radiation with increased propagation paths by multiple reflections.
Authors:
; ; ; ; ;  [1]
  1. School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070 (China)
Publication Date:
OSTI Identifier:
22402883
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 15; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION; CARBON OXIDES; COMPARATIVE EVALUATIONS; COMPOSITE MATERIALS; DIELECTRIC MATERIALS; EFFICIENCY; EPOXIDES; GHZ RANGE; GLASS; GRAPHENE; LOSSES; MATRIX MATERIALS; MICROWAVE RADIATION; PERFORMANCE; REFLECTION; SHEETS; SILVER; TRAPS