Magnetic and microwave-absorption properties of graphite-coated (Fe, Ni) nanocapsules

J. Mater. Sci. Technol. ›› 2011, Vol. 27 ›› Issue (7): 607-614.

• Nanomaterials and Nanotechnology • 上一篇下一篇

Magnetic and microwave-absorption properties of graphite-coated (Fe, Ni) nanocapsules

谢志高¹,张志东¹,耿殿禹²,刘先国¹,¹

1. 中国科学院金属研究所
2. 中科院金属研究所

收稿日期:2009-10-23 修回日期:2010-07-06 出版日期:2011-07-28 发布日期:2011-07-26
基金资助:
国家自然科学基金资助项目;国家重大基础研究

Magnetic and Microwave-absorption Properties of Graphite-coated (Fe, Ni) Nanocapsules

Zhigao Xie, Dianyu Geng, Xianguo Liu, Song Ma, Zhidong Zhang

Shenyang National Laboratory for Materials Science, Institute of Metal Research and International Centre for Material Physics, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China

Received:2009-10-23 Revised:2010-07-06 Online:2011-07-28 Published:2011-07-26
Contact: Z.G. Xie
Supported by:
the National Natural Science Foundation of China under Grant No. 50831006 and the National Major Fundamental Research Program (Grant No. 2010CB934603) of China, Ministry of Science and Technology China

摘要/Abstract

摘要： 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 1.91mm, which cover the whole Ku band.

Abstract: 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.

Key words: Magnetic, Nanocapsules, Microwave absorption

谢志高张志东耿殿禹刘先国. Magnetic and microwave-absorption properties of graphite-coated (Fe, Ni) nanocapsules[J]. J. Mater. Sci. Technol., 2011, 27(7): 607-614.

Zhigao Xie, Dianyu Geng, Xianguo Liu, Song Ma, Zhidong Zhang. Magnetic and Microwave-absorption Properties of Graphite-coated (Fe, Ni) Nanocapsules[J]. J Mater Sci Technol, 2011, 27(7): 607-614.

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Magnetic and microwave-absorption properties of graphite-coated (Fe, Ni) nanocapsules

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