Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7212055 | Composites Part B: Engineering | 2018 | 7 Pages |
Abstract
High reflection loss, wide bandwidth and low density are desirable attributes of electromagnetic wave absorption materials. Here, an ultra-thin MnO2/Fe3O4/carbon nanotube film has been synthesized in two steps using solvothermal deposition and electrochemical deposition. The Fe3O4 nanoparticles and the MnO2 sheets form a nano-scale core-shell structure on the surface of the carbon nanotube film. A series of this hierarchical composite film with different shell structures and MnO2 weight ratios were successfully synthesized. Their unique micro-structure greatly enhances the electromagnetic wave absorption capability of the composites. Instrinsic ferromagnetism is confirmed by the magnetic hysteresis loops. The strong couplings among dielectric loss, hysteresis loss and multiple scattering resulted in the reflection loss up to â42.2â¯dB with the bandwidth of 7.1â¯GHzâ¯at 10% MnO2 weight ratio for a flexible composite film of 1â¯mm thick.
Related Topics
Physical Sciences and Engineering
Engineering
Engineering (General)
Authors
Yiqin Shao, Weibang Lu, Hang Chen, John Q. Xiao, Yiping Qiu, Tsu-Wei Chou,