Enhanced electromagnetic wave absorption of hybrid-architectures Co@SiOxC
Ge, Jianwen; Cui, Yu; Liu, Li; Li, Rui; Meng, Fandi; Wang, Fuhui
AbstractRational design on the well wrapped core-shell microstructure of Co@SiOxC composites was successfully conducted through reduction process of cobalt, efficient condensation reaction of KH-550 silane coupling agent as well as high temperature calcination. The SiOxC shell possessed 3D cross-linked network structure consisting of dielectric carbon and silicon composition for optimal electromagnetic matching. The microstructure, morphology, elements distribution, electromagnetic property and microwave absorption performance were fully characterized, respectively. This SiOxC shell effectively inhibited the agglomeration of cobalt particles, and regulated the complex electromagnetic parameters by decreasing permittivity and introducing polarization relaxation, all of which determined the efficient reflection loss with RLmin value of -60.3 dB at 16.2 GHz and matching thickness of only 2.05 mm. Meanwhile, the effective absorption band is up to 7.1 GHz at 2.3 mm. By optimizing of core-shell structure and material components, the high-absorption performance was obtained through impedance matching, multi-interfacial polarizations, dipole (or defects) polarization and magnetic loss. Therefore, the Co@ SiOxC composites present a facile and promising route toward the design of large-scale-preparation and excellent microwave absorbing materials. (C) 2020 Elsevier B.V. All rights reserved.
WOS IDWOS:000531727400004
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GB/T 7714
Ge, Jianwen,Cui, Yu,Liu, Li,et al. Enhanced electromagnetic wave absorption of hybrid-architectures Co@SiOxC[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,831.
APA Ge, Jianwen,Cui, Yu,Liu, Li,Li, Rui,Meng, Fandi,&Wang, Fuhui.(2020).Enhanced electromagnetic wave absorption of hybrid-architectures Co@SiOxC.JOURNAL OF ALLOYS AND COMPOUNDS,831.
MLA Ge, Jianwen,et al."Enhanced electromagnetic wave absorption of hybrid-architectures Co@SiOxC".JOURNAL OF ALLOYS AND COMPOUNDS 831(2020).
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