Synthesis of sandwich-like Co15Fe85@C/RGO multicomponent composites with tunable electromagnetic parameters and microwave absorption performance

Magnetic particle/carbon hybrid structures are promising candidates for high performance microwave absorbing materials with light weight and strong absorption. However, it remains a great challenge to balance the permittivity and permeability to realize impedance matching and further improve their a...

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Bibliographic Details
Published in:Nanoscale 2020-09, Vol.12 (36), p.18790-18799
Main Authors: Bao, Susu, Tang, Wen, Song, Zhijia, Jiang, Qiaorong, Jiang, Zhiyuan, Xie, Zhaoxiong
Format: Article
Language:English
Subjects:
Absorption spectra
Carbon
Chemical analysis
Chemical composition
Composite materials
Composition effects
Hybrid structures
Impedance matching
Infrared spectroscopy
Magnetic permeability
Magnetic properties
Microwave absorption
Microwave attenuation
Parameters
Sandwich structures
Thickness
Weight reduction
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Summary:Magnetic particle/carbon hybrid structures are promising candidates for high performance microwave absorbing materials with light weight and strong absorption. However, it remains a great challenge to balance the permittivity and permeability to realize impedance matching and further improve their absorption bandwidth. Herein, an effective strategy is designed to fabricate sandwich-like Co15Fe85@C/RGO composites. By introducing RGO sheets in the hybrid structures, the electromagnetic parameters, impedance matching and microwave absorption properties of the final materials can be well controlled. The optimized Co15Fe85@C/RGO composite shows an excellent microwave absorption performance, the strongest reflection loss (RL) of the sample is up to −33.38 dB at 10.72 GHz with a matching thickness of 2.5 mm, and the effective bandwidth (RL < −10 dB) can reach 9.2 GHz (8.64–17.84 GHz). With a single thickness, such a wide absorption band is rarely reported. Their excellent performance can be ascribed to the synergetic effect of the chemical composition and unique sandwich-like structures, which will improve impendence matching and strong microwave attenuation constants of the composites. Our results provide a facile strategy for tuning the electromagnetic parameters and microwave absorption properties of magnetic metal/carbon hybrid structures.
ISSN:2040-3364
2040-3372
DOI:10.1039/d0nr04615a