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Fe3Si-core/amorphous-C-shell nanocapsules with enhanced microwave absorption
Hua, An; Pan, Desheng; Li, Yong; Luan, Jian; Wang, Yu; He, Jun; Geng, Dianyu; Liu, Wei; Ma, Song; Zhang, Zhidong
2019-02-01
Source PublicationJOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
ISSN0304-8853
Volume471Pages:561-567
AbstractNanoscale heterostructures, like core-shell structures, show attractive microwave-absorption characteristics because of the synergetic effects of their dielectric shells and soft-magnetic cores. A new type of nanocapsules with amorphous C shell encapsulating Heusler soft-magnetic Fe3Si alloy has been designed and synthesized in which Si atoms were doped in the C shell to effectively produce a large amount of Si-C bonds to induce the formation of an amorphous C shell. This further significantly improves the dielectric properties of C shells by enhanced dielectric polarization. These tailored Fe3Si/C nanocapsules, exhibit enhanced microwave-absorption properties because of the desirable impedance match between the amorphous C shell and the soft-magnetic Fe3Si. The optimal Fe3Si/C nanocapsules exhibit a highest absorption intensity of - 68.3 dB at 13 GHz and an absorption bandwidth of 4.6 GHz (for RL lower than -10 dB) for absorber thicknesses of 2.1 mm and 1.4 mm, respectively. This new type of nanocapsules is of potential interest for application as novel microwave-absorption material.
KeywordFe3Si nanocapsules Amorphous C shell Arc-discharge Microwave absorption
Indexed BySCI
Language英语
WOS IDWOS:000450089600082
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81421
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Hua, An,Pan, Desheng,Li, Yong,et al. Fe3Si-core/amorphous-C-shell nanocapsules with enhanced microwave absorption[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,2019,471:561-567.
APA Hua, An.,Pan, Desheng.,Li, Yong.,Luan, Jian.,Wang, Yu.,...&Zhang, Zhidong.(2019).Fe3Si-core/amorphous-C-shell nanocapsules with enhanced microwave absorption.JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,471,561-567.
MLA Hua, An,et al."Fe3Si-core/amorphous-C-shell nanocapsules with enhanced microwave absorption".JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 471(2019):561-567.
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