Design of mesostructured γ-Fe2O3/carbon nanocomposites for electromagnetic wave absorption applications

被引：54
作者：
Zhou, Jianhua [1 ,2 ]
He, Jianping [2 ]
Wang, Tao [2 ]
Li, Guoxian [2 ]
Guo, Yunxia [2 ]
Zhao, Jianqing [2 ]
Ma, Yiou [2 ]
机构：
[1] Chinese Acad Sci, Key Lab Renewable Energy & Gas Hydrate, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
[2] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 210016, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 32期
关键词：
Mesostructure; Microwave absorption; Impedance matching; Magnetic properties; MICROWAVE-ABSORPTION; MESOPOROUS CARBONS; COMPOSITES; SILICA; NANOTUBES; BAND;
D O I：
10.1016/j.jallcom.2011.05.042
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We propose and demonstrate a scheme to enhance microwave absorption property through mesoporous structure with high regularity. The mesostructured nanocomposites, embedding gamma-Fe2O3 within carbon matrix, exhibit a strong and broadband attenuation of microwave in the frequency range of 0.5-18 GHz, mainly due to the better impedance matching. C-2Fe-900 exhibits strong absorption characteristics with an absorption peak of -32.0 dB at 6.4 GHz. The absorption peak intensity and position can be adjusted by changing the matching thickness of the coating. Reflection loss below -10 dB (i.e., absorption above 90%) is obtained in the frequency range of 1.9-10.7 GHz. (C) 2011 Elsevier B. V. All rights reserved.
引用
收藏
页码：8211 / 8214
页数：4
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