Interface transformation for enhanced microwave-absorption properties of core double-shell nanocomposites
文献类型：期刊论文
| 作者 | Feng, Yang ; Li, Da ; Jiang, Linwen ; Dai, Zhiming ; Wang, Yu ; An, Jing ; Ren, Weijun ; He, Jun ; Wang, Zhenhua ; Liu, Wei ; Zhang, Zhidong |
| 刊名 | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| 出版日期 | 2017-02-15 |
| 卷号 | 694页码:1224-1231 |
| 关键词 | Complex permeability Complex permittivity Interface effect Nanocomposite |
| ISSN号 | 0925-8388 |
| 通讯作者 | Li, D (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China. |
| 中文摘要 | Microwave absorption properties of core double-shell nanocomposites with FeCo core, carbon inner shell and CoFe2O4 or mixed FeCo-CoFe2O4 outer shell have been investigated in the 2-18 GHz frequency range. The synergetic effect of the composition and interface evolution of the core double-shell nano composites favors the electromagnetic properties. Multiple dielectric/magnetic loss peaks are observed in the frequency dependence of the complex permittivity/complex permeability of the core double-shell nanocomposites. Compared with FeCo/C nanocapsules and CoFe2O4 nanoparticles, new dielectric relaxation peaks at 10.5 and 14.4 GHz and loss peaks at 4 and 16.4 GHz are found, which are ascribed to the interface effect in the (x)FeCo/C/CoFe2O4 nanocomposites, where x is the weight fraction of FeCo/C nanocapsules in the (x)FeCo/C/CoFe2O4 nanocomposites. The absorption bandwidth with reflection-loss (RL) values exceeding-10 dB extends up to 7.2 GHz, covering the 10.8-18 GHz frequency range in the case of the (80 wt%)FeCo/C/CoFe2O4 nanocomposite with a minimum RL value of-25.8 dB at 16.7 GHz. Thanks to the modified composition/crystal size of the outer shell, enhanced microwave-absorption properties are obtained in the (60 wt%)FeCo/C/(FeCo, CoFe2O4) nanocomposite, where the minimum RL value is-38.1 dB at 13.4 GHz and which has a broad absorption bandwidth of 6.7 GHz (RL values exceeding-10 dB), covering the 11.3-18 GHz frequency range by choosing an appropriate absorber thickness. (C) 2016 Elsevier B.V. All rights reserved. |
| 学科主题 | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [51171185, 51331006, 51371055]; National Basic Research Program of China [2012CB933103]; Ministry of Science and Technology China |
| 语种 | 英语 |
| 公开日期 | 2017-08-17 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/78295]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Feng, Yang,Li, Da,Jiang, Linwen,et al. Interface transformation for enhanced microwave-absorption properties of core double-shell nanocomposites[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2017,694:1224-1231. |
| APA | Feng, Yang.,Li, Da.,Jiang, Linwen.,Dai, Zhiming.,Wang, Yu.,...&Zhang, Zhidong.(2017).Interface transformation for enhanced microwave-absorption properties of core double-shell nanocomposites.JOURNAL OF ALLOYS AND COMPOUNDS,694,1224-1231. |
| MLA | Feng, Yang,et al."Interface transformation for enhanced microwave-absorption properties of core double-shell nanocomposites".JOURNAL OF ALLOYS AND COMPOUNDS 694(2017):1224-1231. |
入库方式： OAI收割
来源：金属研究所
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