期刊
COMPOSITES COMMUNICATIONS
卷 21, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.coco.2020.100362
关键词
Metal-organic framework; Microwave absorption; Reduced graphene oxide; Broadband absorption
资金
- National Natural Science Foundation of China [51672222]
- Spaceflight Foundation of China [2014-HT-XGD, 2019JLM-32]
High efficient MIL-53(Fe) derived gamma-Fe2O3 coated by carbon framework (MCC for short) and compound with reduced graphene oxide for broadband microwave absorption is prepared by facile hydrothermal method and gradient temperature calcination. The sheets/bowknot-shaped nanoparticles structure have better microwave absorption performance via uniting magnetic gamma-Fe2O3 core, carbon skeleton and rGO sheets. Binary material calcined at 600 degrees C has an optimal RL value -62.53dB under 2.66 mm thickness. In addition, the ternary MCC/rGO of 700 degrees C calcination has better performance with an 11.68GHz effective absorption bandwidth (from 6.32GHz to 18GHz) of a single thickness of 3.60 mm, and a maximum R-L of -43.13dB at 3.25mm thickness. The MOF framework enhances particle stability and internal scattering, while graphene provides a larger absorption surface, coupled with the good impedance matching rooted in suitable permittivity and permeability, the material is an ideal new type of absorbing material.
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