Multiple synergistic losses in the absorption of electromagnetic waves by three-dimensional cross-linked carbon fiber

doi:10.1016/j.carbon.2022.04.035

IMR OpenIR

	Multiple synergistic losses in the absorption of electromagnetic waves by three-dimensional cross-linked carbon fiber
	Dai, Bushi 1; Li, Jinyang 1; Liu, Xiaoguang 2; Wang, Na 1; Dai, Yuxiang 1; Qi, Yang 1
通讯作者	Dai, Yuxiang(daiyuxiang@mail.neu.edu.cn) ; Qi, Yang(qiyang@imp.neu.edu.cn)
	2022-08-15
发表期刊	CARBON
ISSN	0008-6223
卷号	195 页码:308-318
摘要	Carbon fiber with a three-dimensional (3D) cross-linked structure was prepared by electrostatic spinning and heat treatment. The HRTEM images of carbon fiber were used as the basis for determining the types of graphite defects in carbon fiber by combining the intensity ratios of the D and D' peaks in the Raman spectra, and the contribution of different graphite defects types in carbon fiber to electromagnetic wave absorption was analyzed. Among the three types of graphite defects, sp3 type, vacancy type, and boundary type, the carbon fiber with predominantly boundary type graphite defects showed excellent electromagnetic wave absorption performance. The heat treatment temperature has a significant effect on the conductivity and electromagnetic properties. The broadest effective absorption bandwidth (EAB) is 5.44 GHz at 2.07 mm when the thermal treatment temperature is 650 degrees C. In carbon fiber with a carbonization temperature of 850 degrees, graphite nanocrystals and large graphite areas coexist and graphite defects are predominantly of the boundary type. Interfacial polarization of amorphous carbon and graphite nanocrystals under the action of electromagnetic waves produces dielectric losses; large graphite areas produce conductive losses and eddy current losses. The dielectric loss, conductive loss, and eddy current loss synergistically achieve a strong absorption of the electromagnetic wave multi-spectrum at 5.08 GHz, -40.55 dB, -43.35 dB, and -44.44 dB at 5.08 GHz, 7.46 GHz, and 14.94 GHz respectively. Without the addition of magnetic materials, the carbon fiber in this study achieves the ability of a dielectric loss type electromagnetic wave absorbing material to possess magnetic loss.
关键词	Electromagnetic wave absorption Carbon fiber Crystal defects Graphite nanocrystals Eddy current loss Three-dimensional cross-linked structure
资助者	National Natural Science Foundation of China ; China Postdoctoral Science Foundation
DOI	10.1016/j.carbon.2022.04.035
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[61971116] ; China Postdoctoral Science Foundation[2021M700093]
WOS研究方向	Chemistry ; Materials Science
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary
WOS记录号	WOS:000831026300003
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：50[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/174672
专题	中国科学院金属研究所
通讯作者	Dai, Yuxiang; Qi, Yang
作者单位	1.Northeastern Univ, Sch Mat Sci, Dept Mat Phys & Chem, 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	Dai, Bushi,Li, Jinyang,Liu, Xiaoguang,et al. Multiple synergistic losses in the absorption of electromagnetic waves by three-dimensional cross-linked carbon fiber[J]. CARBON,2022,195:308-318.
APA	Dai, Bushi,Li, Jinyang,Liu, Xiaoguang,Wang, Na,Dai, Yuxiang,&Qi, Yang.(2022).Multiple synergistic losses in the absorption of electromagnetic waves by three-dimensional cross-linked carbon fiber.CARBON,195,308-318.
MLA	Dai, Bushi,et al."Multiple synergistic losses in the absorption of electromagnetic waves by three-dimensional cross-linked carbon fiber".CARBON 195(2022):308-318.