Coupling Fe@Fe3O4 nanoparticles with multiple-walled carbon nanotubes with width band electromagnetic absorption performance

Abstract To reduce electromagnetic interference (EMI) and irradiation, one efficient path is to develop electromagnetic absorption (EMA) material with the aim of high-efficient convert electromagnetic wave into thermal energy. Presently strategy to design high-performance electromagnetic absorber is followed by the way of component optimization and microstructure design. This research reported an advanced HWCNTs/Fe@Fe 3 O 4 ternary absorber, which was fabricated by decorating H 2 O 2 treated carbon nanotubes (HCNTs) with magnetic core-shell shaped Fe@Fe 3 O 4 nanoparticles. This HCNTs/Fe@Fe 3 O 4 composite exhibits various electromagnetic loss forms, including conductive, dipole, interface loss etc . which attribute to EMA ability. The largest qualified frequency width ( f E ) can up to 5.4 GHz with a thickness of 1.5 mm. To discuss the EMA loss mechanism, control experiments have been conducted by preparation of Fe@Fe 3 O 4 , HCNTs@Fe@Fe 2 O 3 composites. In this way, the attenuation mechanism can be better understood.