Electromagnetic wave absorption properties of mesoporous Fe3O4/C nanocomposites. (August 2015)

• Record Type: Journal Article
• Authors: Zou, Changwu; Yao, Yadong; Wei, Niandong; Gong, Yichao; Fu, Weidong; Wang, Meng; Jiang, Lei; Liao, Xiaoming; Yin, Guangfu; Huang, Zhongbin; Chen, Xianchun
• Is Part Of: Composites. Volume 77(2015)
• Page Start: 209
• Page End: 214
• Publication Date: 2015-08
• Subjects: B. Magnetic properties; Composite materials -- Periodicals; Materials science -- Periodicals; Composite materials; Periodicals; Electronic journals; 620.118
• DOI: 10.1016/j.compositesb.2015.03.030
• Languages: English
• ISSNs: 1359-8368

Abstract

Abstract: In this work, the mesoporous Fe3 O4 /C nanocomposites with a yolk-shell structure (Fe3 O4 @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 Fe3 O4 @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 Fe3 O4 @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 Fe3 O4 @void@C nanocomposites possess a lower reflection loss of-10 dB under 2 GHz bandwidth. We believe that the investigations on the Fe3 O4 @void@C nanocomposite open up a route to develop a new type of composite, which is considered as a promising candidate for microwave absorber.