Abstract
This research employed an in-situ growth method to fabrication of multi-walled nanotubes (MWCNTs)/Fe3O4 electromagnetic absorber. Such a binary material system is featured with good impedance matching behavior and moderate attenuation ability, thus exhibits excellent electromagnetic absorption properties. The results reveal that MWCNTs/Fe3O4 exhibits distinct polarization relaxation phenomenon which inducted by interface polarization. This intensity of interface polarization is tunable by controlling the contact area of Fe3O4 and MWCNTs. Due to the contribution of interface polarization loss behavior, the MWCNTs/Fe3O4 sample achieves a wide band electromagnetic absorption property which the frequency region with RL < −10 dB can covers 5.7 GHz at 1.5 mm. The method of utilizing interface strategy to boost dielectric loss ability has an efficient way to gain wide band electromagnetic absorber.
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