Open AccessMicrowave absorption properties of MWCNT-SiC composites synthesized via a low temperature induced reaction
Author(s) -
Huiling Zhu,
YuJun Bai,
Rui Liu,
Ning Lun,
YongXin Qi,
Fudong Han,
XiangLin Meng,
Jianqiang Bi,
Runhua Fan
Publication year - 2011
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.3630126
Subject(s) - materials science , composite material , reflection loss , crystallite , carbon nanotube , porosity , microwave , stacking , nanocrystal , composite number , nanotechnology , physics , nuclear magnetic resonance , quantum mechanics , metallurgy
The composites containing SiC and multiwalled carbon nanotubes (MWCNTs) were synthesized via the reaction of Si powders and MWCNTs induced by that of Na and sulfur. The MWCNT-SiC composites prepared at 600 °C exhibit excellent microwave absorbing properties, which reach a minimum reflection loss of -38.7 dB at a frequency around 12.9 GHz. The absorbing properties are bound up with the high yield of porous SiC spheres comprised of nanocrystals. The porous structure, high density of stacking faults in SiC crystallites, interfaces between MWCNTs and SiC spheres, grain boundaries between SiC nanocrystals, as well as the interfacial polarizations aroused therefrom, are responsible for the excellent microwave absorbing properties
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