The structure, magnetic and microwave-absorption properties of graphite-coated （Fe, Ni） alloy nanocapsules, synthesized by the arc-discharge method, have been studied. High-resolution transmission electron microscopy shows that the nanocapsules have a core/shell structure with （Fe, Ni） alloy as the core and graphite as the shell. All （Fe, Ni） alloy nanocapsules/paraffin composites show good microwave-absorption properties. The optimal reflection loss （RL） was found for （Fe70Ni30）/C nanocapsules/paraffin composites, being -47.84 dB at 14.6 GHz for an absorber thickness of 1.99 mm, while the RL values exceeding -10 dB were found in the 12.4– 17.4 GHz range, which almost covers the Ku band （12.4–18 GHz）. For （Fe70Ni30）/C nanocapsules/paraffin composites, RL values can exceed -10 dB in the 11.4–18 GHz range with an absorber thickness of 1.91 mm, which cover the whole Ku band.
参考文献
| [1] | S. Sugimoto;T. Maeda;D. Book .GHz microwave absorption of a fine #alpha# -Fe structure produced by the disproportionation of Sm_2Fe_(17) in hydrogen[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2002(0):301-306. |
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