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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Preparation and microwave absorption properties of
FeNi/graphite nanocomposites
YANG Li(杨  丽), HE Huan(何  欢), LIU Hong-bo(刘洪波),
ZOU Yan-hong(邹艳红), CHEN Hui(陈  惠), ZHOU Ru-quan(周如全)

College of Materials Science and Engineering, Hunan University, Changsha 410082, China

Abstract:FeNi/graphite nanocomposites were prepared by reducing FeCl3-NiCl2-GICs in H2. The elemental composition, structure, magnetic and microwave absorption of FeNi/graphite nanocomposites were investigated using X-ray diffraction, energy dispersive spectra, hysteresis loop and electromagnetic parameter analysis. The results show that with the increase of the reduced temperature, the number and size of particles of FeNi increases, and the FeNi /graphite nanocomposites changes to soft magnetism. FeNi /graphite nanocomposites bear microwave absorption properties. With the increase of the thickness of the sample, the matching frequency tends to shift to the low frequency region, and theoretical reflection loss becomes less at the matching frequency. Microwave absorption property in the low frequency region of FeNi/graphite nanocomposites prepared at 600 ℃ (FeNi/C600) is the best. When the thickness is 2 mm, the maximum theoretical reflection loss of FeNi/C600 is −4.3 dB and the matching frequency is 3.5 GHz.

 

Key words: graphite intercalated compound; FeNi/graphite nanocomposite; microwave absorption

ISSN 1672-7029
CN 43-1423/U

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