Strong microwave absorption of Fe@SiO2 nanocapsules fabricated by one-step high energy plasma

doi:10.1016/j.jpcs.2019.01.001

CORC > 金属研究所 > 中国科学院金属研究所

	Strong microwave absorption of Fe@SiO2 nanocapsules fabricated by one-step high energy plasma
	Javid, Muhammad 2; Zhou, Yuanliang 2; Wang, Dongxing 2; Liang, Jingshuang 2; Li, Da 4; Shi, Guimei 1; Shah, Asif 2; Zhou, Lei 2; Zhang, Xuefeng 3; Dong, Xinglong 2
刊名	JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
	2019-06-01
卷号	129 页码:242-251
关键词	Fe@SiO2 NCs Fe NPs Arc-plasma Magnetic behavior Electromagnetic parameter Reflection loss
ISSN号	0022-3697
DOI	10.1016/j.jpcs.2019.01.001
通讯作者	Dong, Xinglong(dongxl@dlut.edu.cn) ; Zhang, Zhidong(zdzhang@imr.ac.cn)
英文摘要	Herein, the spherical Fe@SiO2 nanocapsules (NCs) has been synthesized by a one-step way of DC arc-discharge plasma under a mixture atmosphere of H-2 and Ar. The high energy states of excited ions (Ar, H, Fe, Si) within plasma region are in situ recorded by online optical emission spectroscopy (OES) and become visible evidence for the energy conditions in the fabrication of Fe@SiO2 NCs. It indicates that the evaluated electron temperature of plasma reaches up to 3 x 10(4) K (similar to 2.6 eV) and can significantly influence the characters of the final product of Fe@SiO2. Magnetic measurement reveals that Fe@SiO2 NCs is dominant ferromagnetism exhibiting partial transition into superparamagnetism at T-B = 160 K. Electromagnetic parameters (permittivity, permeability) in frequency range of 2-18 GHz show that an appropriate impedance matching has been established in Fe@SiO2/paraffin composite, which brings about excellent reflection loss (RL) of -6/.6 dB at 9.3 GHz with thickness of 2.81 mm, and a wide bandwidth from 6 to 18 GHz with RL <= - 10 dB. The significant impact of a SiO2 layer on the electromagnetic performances of Fe@SiO2 NCs has been emphasized here, with respect to behaviors of the counterpart, i.e. pure Fe nanoparticles (NPs).
资助项目	National Natural Science Foundations of China[51331006] ; National Natural Science Foundations of China[51271044] ; National Natural Science Foundations of China[51171033]
WOS研究方向	Chemistry ; Physics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000466250300030
资助机构	National Natural Science Foundations of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/133228]
专题	金属研究所_中国科学院金属研究所
通讯作者	Dong, Xinglong; Zhang, Zhidong
作者单位	1.Shenyang Univ Technol, 111,Shenliao West Rd, Shenyang 110870, Liaoning, Peoples R China 2.Dalian Univ Technol, Key Lab Mat Modificat Laser Ion & Elect Beams, Minist Educ, Sch Mat Sci & Engn, Dalian 116023, Peoples R China 3.Hangzhou Dianzi Univ, Innovat Ctr Adv Mat, Hangzhou 310012, Zhejiang, Peoples R China 4.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Javid, Muhammad,Zhou, Yuanliang,Wang, Dongxing,et al. Strong microwave absorption of Fe@SiO2 nanocapsules fabricated by one-step high energy plasma[J]. JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS,2019,129:242-251.
APA	Javid, Muhammad.,Zhou, Yuanliang.,Wang, Dongxing.,Liang, Jingshuang.,Li, Da.,...&Zhang, Zhidong.(2019).Strong microwave absorption of Fe@SiO2 nanocapsules fabricated by one-step high energy plasma.JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS,129,242-251.
MLA	Javid, Muhammad,et al."Strong microwave absorption of Fe@SiO2 nanocapsules fabricated by one-step high energy plasma".JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS 129(2019):242-251.