Enhanced electromagnetic wave absorption of hybrid-architectures Co@SiOxC

doi:10.1016/j.jallcom.2020.154442

CORC > 金属研究所 > 中国科学院金属研究所

	Enhanced electromagnetic wave absorption of hybrid-architectures Co@SiOxC
	Ge, Jianwen 1; Cui, Yu 2; Liu, Li 1; Li, Rui 1; Meng, Fandi 1; Wang, Fuhui 1
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2020-08-05
卷号	831 页码:12
关键词	Co@SiOxC composites KH-550 Carbon Microwave absorption performance
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2020.154442
通讯作者	Liu, Li(liuli@mail.neu.edu.cn)
英文摘要	Rational 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.
资助项目	National Natural Science Foundation of China[51622106] ; Fundamental Research Funds for the Central Universities[2017YFB0702303] ; Liao Ning Revitalization Talents Program[XLYC1807076]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000531727400004
资助机构	National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Liao Ning Revitalization Talents Program
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/138825]
专题	金属研究所_中国科学院金属研究所
通讯作者	Liu, Li
作者单位	1.Northeastern Univ, Shenyang Natl Lab Mat Sci, Shenyang 110819, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 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,2020,831:12.
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,831,12.
MLA	Ge, Jianwen,et al."Enhanced electromagnetic wave absorption of hybrid-architectures Co@SiOxC".JOURNAL OF ALLOYS AND COMPOUNDS 831(2020):12.