Synthesis, characterization and microwave absorption of carbon-coated Cu nanocapsules

Materials Research

Yuping Sun²  Chao Feng¹  Xianguo Liu¹  Siu Wing Or¹  Chuangui Jin¹ 

[1] ,Anhui University of Technology Center for Engineering practice and Innovation Education Maanshan,China

关键词: nanocomposites;    carbon;    microwave absorbers;   

DOI  :  10.1590/S1516-14392014005000005

来源: SciELO

【 摘 要 】

The microstructure and microwave absorption of carbon-coated Cu nanocapsules have been investigated. Carbon-coated Cu nanocapsules have been synthesized by an arc-discharge method. The paraffin-Cu/C nanocapsules composite shows excellent electromagnetic (EM) absorption properties. An optimal reflection loss (RL) value of - 40.0 dB is reached at 10.52 GHz for a layer 1.9 mm thickness. RL exceeding - 20 dB can be realized in any interval within the 1-18 GHz range by choosing an appropriate thickness of the absorbent layer between 1.1 and 10.0 mm. Theoretical simulation for the microwave absorption using the transmission line theory agrees reasonably well with the experimental results. The EM-wave absorption properties of nanocapsules materials are illustrated by means of an absorption-tube-map. The carbon-coated Cu nanocapsule is an attractive candidate for EM-wave absorption, which significantly enriches the family of EM-wave nanoabsorbents.

【 授权许可】

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