Abstract
Generation of multi-components synergistic absorbers is of value for efficient electromagnetic wave (EMW) absorption. This study constructed two kinds of nano-Fe3O4 decorated carbon aerogels with disparate microstructures (either Fe3O4 nucleated on the surface of carbon skeleton or the pore inside the aerogel) and highlighted the significance of the coupling microstructure on the EMW absorption capacity of the magnetic-dielectric material. The results demonstrate that the readily Fe3O4 coated and distributed carbon aerogel favors to improve EMW absorbing performance. A minimum reflection loss (RLmin) value of −51.8 dB is achieved at 4.9 GHz. In addition, the effective absorption bandwidth (EAB) covered the Ku bands under the matching thickness of only 1.8 mm. The favorable impedance matching and abundant hetero-interfaces collectively contribute to the EMW attenuation. The work with respect to interfacial structural control is of great reference value for designing excellent EMW absorber candidates.
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