期刊
COMPOSITES PART B-ENGINEERING
卷 77, 期 -, 页码 209-214出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2015.03.030
关键词
Magnetic properties
资金
- Sichuan Province through a Key Technologies Research and Development Program of Sichuan Province [2011 gz0110]
In this work, the mesoporous Fe3O4/C nanocomposites with a yolk-shell structure (Fe3O4@void@C) were prepared by a silica-assisted strategy, and their microstructure, magnetic properties, and microwave absorption were studied in detail. The BET surface area and the total pore volume of Fe3O4@void@C are 171.5 m(2) g(-1) and 0.19 cm(3) g(-1), respectively. The composites show a saturation magnetization of 35.4 emu/g and reduced hysteresis loss at room temperature. The Fe3O4@void@C nanocomposites exhibit the obvious complementarities between complex permittivity and permeability. A minimum reflection loss value of 18.1 dB was obtained for the absorber thickness reaching 2.0 mm, and even the Fe3O4@void@C nanocomposites possess a lower reflection loss of-10 dB under 2 GHz bandwidth. We believe that the investigations on the Fe3O4@void@C nanocomposite open up a route to develop a new type of composite, which is considered as a promising candidate for microwave absorber. (C) 2015 Elsevier Ltd. All rights reserved.
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