Abstract
To against the excessive electromagnetic radiation in the current situation, herein the PANI-derived carbon block with flaky Fe3O4/FeS inserted was obtained via a facile route of co-chemical precipitation, low temperature polymerization and vacuum calcination. It discovers that the component of composites and disordered structures in carbon can be regulated by changing the additive amount of iron oxide, and hence the modified electromagnetic parameters to optimize the impedance matching between free air and composites can be achieved as well. On this basis, by optimizing the coupled effect of intrinsic polarizations, conductive dissipation, magnetic resonance and eddy current wastage, the PDC/Fe3O4/FeS composite realizes the efficient microwave absorption within a broad range of 6.55 GHz, covering the entire Ku band for only 2.2 mm thickness of absorber. The work offers a flexible strategy to synthesize desired candidate for broadband electromagnetic protection.
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