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Title: Molten-salt-mediated synthesis of SiC nanowires for microwave absorption applications
Authors: Wu, R.
Zhou, K.
Yang, Z. 
Qian, X.
Wei, J.
Liu, L.
Huang, Y.
Kong, L.
Wang, L.
Issue Date: 21-Jan-2013
Source: Wu, R., Zhou, K., Yang, Z., Qian, X., Wei, J., Liu, L., Huang, Y., Kong, L., Wang, L. (2013-01-21). Molten-salt-mediated synthesis of SiC nanowires for microwave absorption applications. CrystEngComm 15 (3) : 570-576. ScholarBank@NUS Repository.
Abstract: Silicon carbide (SiC) nanowires were synthesized by a reaction of multiwall carbon nanotubes (MWCNTs) and silicon vapor from molten salt medium at 1250 °C. The phase, morphology, and microstructure of the nanowires were systemically characterized by X-ray diffraction, field emission scanning electron microscopy, and high resolution transmission electron microscopy. The results revealed that the nanowires were of single-crystalline β-SiC phase with the growth direction along [111] and had diameters of 20-80 nm and lengths up to several tens of micrometers. The molten salt introduced facilitated the evaporation of Si (vapor) onto MWCNTs (solid) and the growth of SiC nanowires followed the vapor-solid process. The investigation of microwave absorbability indicated that a minimum reflection loss of -17.4 dB at 11.2 GHz could be achieved with 30 wt% SiC nanowires as the filler in the silicone matrix. The attenuation of microwave could be attributed to the dielectric loss and a possible absorption mechanism was also discussed. © 2013 The Royal Society of Chemistry.
Source Title: CrystEngComm
ISSN: 14668033
DOI: 10.1039/c2ce26510a
Appears in Collections:Staff Publications

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