Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5490956 | Journal of Magnetism and Magnetic Materials | 2017 | 7 Pages |
Abstract
Flake carbonyl iron/Fe3O4 (FCI/Fe3O4) composites with enhanced microwave absorption properties were prepared by a direct and flexible surface oxidation technique. The phase structures, morphology, magnetic properties, frequency-dependent electromagnetic and microwave absorption properties of the composites were investigated. The measurement results showed that lower permittivity as well as modest permeability was obtained by the FCI/Fe3O4 composites. The calculated microwave absorption properties indicated that enhanced absorption efficiency and broader absorption band were obtained by the FCI/Fe3O4 composite comparing with the FCI composite. The absorption frequency range with reflection loss (RL) below â5Â dB of FCI/Fe3O4 composites at reaction time of 90Â min at thickness of 1.5Â mm is 13.3Â GHz from 4.7 to 18Â GHz, while the bandwidth of the FCI composite is only 5.9Â GHz from 2.6 to 8.5Â GHz at the same thickness. Thus, such absorbers could act as effective and wide broadband microwave absorbers in the GHz range.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Dandan Min, Wancheng Zhou, Fa Luo, Dongmei Zhu,