Optimizing the electromagnetic wave absorption performance of designed hollow CoFe2O4/CoFe@C microspheres

doi:10.1016/j.jmst.2020.10.082

CORC > 金属研究所 > 中国科学院金属研究所

	Optimizing the electromagnetic wave absorption performance of designed hollow CoFe2O4/CoFe@C microspheres
	Ge, Jianwen 2; Liu, Shimeng 2; Liu, Li 2; Cui, Yu 1; Meng, Fandi 2; Li, Yixing 2; Zhang, Xuefeng 2; Wang, Fuhui 2
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2021-08-10
卷号	81 页码:190-202
关键词	CoFe2O4/CoFe@C Alloying processing Absorption performance Carbon layers
ISSN号	1005-0302
DOI	10.1016/j.jmst.2020.10.082
通讯作者	Liu, Li(liuli@mail.neu.edu.cn)
英文摘要	Whereas hollow composites present some superiorities like abundant micro interfaces, outstanding impedance matching as the responses of electromagnetic wave (EMW), but versatile designs including crystal transformation, heterogeneous structures and magnetic exchange coupling to further contribution are even not designed or stressed together in previous literatures. In this article, rational design on the hollow CoFe2O4/CoFe@C architecture has been conducted by a sequential process of self-sacrifice by combustion, in-suit polymerization and calcination. Results of morphology observation exhibit that heterogeneous CoFe2O4/CoFe@C composites were generated via crystal transformation from CoFe2O4 to CoFe alloys with encapsulated carbon, together with ultimate growth of crystal particles. As for three carbon-based architectures, relatively low-graphitization carbon layers are favorable for enhancing impedance matching and polarization relaxation, but suppressing the conductive loss essentially. Moderate carbon content endows sample S2 with the maximum magnetic saturation (M-s) of 152.4 emu g(-1). The optimized RL of sample S3 is up to -51 dB with 30 wt% loading, and the effective absorption band (EAB) is of 5.9 GHz at the thickness of 2.17 mm, while 6.0 GHz can be reached at 2.5 mm. Therefore, this hollow multi-interfaces design definitely shed light on novel structure for new excellent absorbers. (c) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
资助项目	National Natural Science Foundation of China[51622106] ; Liao Ning Revitalization Talents Program[XLYC1807076]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	JOURNAL MATER SCI TECHNOL
WOS记录号	WOS:000658560600020
资助机构	National Natural Science Foundation of China ; Liao Ning Revitalization Talents Program
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/160310]
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.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Northeastern Univ, Shenyang Natl Lab Mat Sci, Shenyang 110819, Peoples R China
推荐引用方式 GB/T 7714	Ge, Jianwen,Liu, Shimeng,Liu, Li,et al. Optimizing the electromagnetic wave absorption performance of designed hollow CoFe2O4/CoFe@C microspheres[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2021,81:190-202.
APA	Ge, Jianwen.,Liu, Shimeng.,Liu, Li.,Cui, Yu.,Meng, Fandi.,...&Wang, Fuhui.(2021).Optimizing the electromagnetic wave absorption performance of designed hollow CoFe2O4/CoFe@C microspheres.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,81,190-202.
MLA	Ge, Jianwen,et al."Optimizing the electromagnetic wave absorption performance of designed hollow CoFe2O4/CoFe@C microspheres".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 81(2021):190-202.