The similar Cole-Cole semicircles and microwave absorption of Hexagonal Co/C composites

Hexagonal Co/C composites have been successfully prepared by hydrothermal method. And the preparation of hexagonal Co/C composites can provide possibilities for fabricating other metal/C composites. With different content carbon, the absorbing capacities of hexagonal Co/C are different. By analyzing...

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Bibliographic Details
Published in:Journal of alloys and compounds 2018-06, Vol.750, p.917-926
Main Authors: Xing, Wenjia, Li, Ping, Wang, Hua, Lei, Qin, Huang, Yong, Fan, Junlong, Xu, Guangliang
Format: Article
Language:English
Subjects:
Composite materials
Electromagnetic parameters
Electromagnetism
Hexagonal Co/C composites
Magnetism
Metals
Microwave absorption
Microwaves
Reflection loss
Similar cole-cole semicircle
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Summary:Hexagonal Co/C composites have been successfully prepared by hydrothermal method. And the preparation of hexagonal Co/C composites can provide possibilities for fabricating other metal/C composites. With different content carbon, the absorbing capacities of hexagonal Co/C are different. By analyzing the electromagnetic parameters, we have proved the similar Cole-Cole semicircles in μ″-μ′ curves and each similar Cole-Cole corresponds to a loss of resonance. However, the first similar Cole-Cole semicircle has more important to reflection loss (RL). The optimum RL value is −47.5 dB, and the broadest band of RL ≤ -10 dB is 5.6 GHz. •Through hydrothermal method, the C/Co composites have been prepared.•The similar Cole-Cole semicircle is related to α, f, fri and χi.•The maximum absorption bandwidth is 5.6 GHz for RL ≤ -10 dB at d = 1.9 mm.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2018.04.051