Flower-like α-Fe₂O₃/ordered mesoporous carbon nanocomposite and its enhanced microwave absorption property

Three-dimensional flower-like α-Fe₂O₃ structures were grown on the surface of ordered mesoporous carbon nanorods through a facile hydrothermal method, and their electromagnetic (EM) parameters were measured at 2-18 GHz. The special geometric morphology and proper magnetic loss of α-Fe₂O₃ nanoparticles and the strong dielectric polarisations and relaxations in the composites contribute to its excellent EM wave absorption. A reflection loss exceeding -10 dB was obtained at 9·9-16·1 GHz for an absorber of 50 wt-% loading with 2·50 mm thickness layer. The result provides a novel EM wave absorbing material to meet the practical applications.