Carbonyl Iron/Graphite Double-Layer Structural Absorbing Composite

Abstract

A study of a new structured composite absorbing material, prepared using carbonyl iron and graphite as absorbers within a resin matrix. The study investigated the effects of varying the concentration of absorbing agent within the layers of the absorbing composite. Results show that the best absorbency was achieved when the impedance-matching layer contained 20% carbonyl iron content and the absorbing layer contained 35% graphite. The peak absorption was -20.19 dB, with a bandwidth of 7.3GHz (R< -10 dB) in the frequency range of 8 to 18 GHz. This work will certainly have significance guiding research on the application of stealth materials and composite materials.