Journal
MATERIALS RESEARCH BULLETIN
Volume 161, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2023.112171
Keywords
Electromagnetic absorption; Fe O-3 ( 4) microspheres; Simulation; Synergistic effect
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Fe3O4/Co-MOF composites were successfully fabricated via a facile and scalable co-precipitation process. The combination of hollow Fe3O4 and Co-MOFs contributes towards the dissipation of incident waves due to the magnetic-dielectric synergistic effect. Impressive microwave absorption ability was observed with a minimum reflection loss of -56.1 dB over a qualified bandwidth (7.9 GHz) at 2.0 mm. Radar cross section simulation further confirmed the effective suppression of radar wave scattering using Fe3O4/Co-MOF composites. This study provides a versatile strategy for designing magnetic-dielectric composites based on MOFs as effective and broadband microwave absorbers.
Metal-organic frameworks (MOFs) with intrinsic porosity and high specific surface area have aroused broad interests as a promising electromagnetic (EM) absorbing material. However, the introduction of magnetic components in MOFs has remained as a formidable obstacle for subsequent development. Herein, Fe3O4/Co-MOF composites were fabricated via a facile and scalable co-precipitation process. The microstructure and morphology of the composites were characterized and the combination of hollow Fe3O4 and Co-MOFs was found to contribute towards the dissipation of incident waves due to the magnetic-dielectric synergistic effect. Impressive microwave absorption ability was obtained with a minimum reflection loss of -56.1 dB over a qualified bandwidth (7.9 GHz) at 2.0 mm. Moreover, the radar cross section simulation further confirmed the effective suppression of radar wave scattering using Fe3O4/Co-MOF composites. This study provides a versatile strategy for designing magnetic-dielectric composites based on MOFs as effective and broadband microwave absorbers.
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