Synthesis of β-SiC/SiO_2 core-shell nanowires by simple thermal evaporation
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概要
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Beta-SiC/SiO_2 core-shell nanowires were obtained in a mullite boat after the reaction between silicon nanopowder and CH_4 gas at 1623K (1350℃), without adding metal catalysts from outside. The as-grown nanowires were characterized by X-ray diffractometry, scanning electron microscopy, transmission electron microscopy, scanning TEM, and infrared-ray spectroscopy. The results showed that the typical nanowires consisted of single crystalline β-phase SiC core of 50-70nm in diameter and a uniform wrapping layer of low crystallinity SiO_2 of 〜15nm in thickness, and their lengths were up to several tens of micrometers. The nanowires axes lay along the [111] direction of β-SiC. Oxygen from the experimental setup or the raw powder should be a key factor to synthesize the core/shell nanowires.
- 社団法人日本セラミックス協会の論文
- 2009-02-01
著者
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Yoshida Katsumi
Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
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IMAI Masamitsu
Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
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YANO Toyohiko
Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
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Yoshida Katsumi
Res. Lab. For Nuclear Reactors Tokyo Inst. Of Technol.
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Yano Toyohiko
Research Laboratory For Nuclear Reactors Tokyo Institute Of Technology
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Imai Masamitsu
Research Laboratory For Nuclear Reactors Tokyo Institute Of Technology
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KHONGWONG Wasana
Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology
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Khongwong Wasana
Research Laboratory For Nuclear Reactors Tokyo Institute Of Technology
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Yano Toyohiko
Tokyo Inst. Of Technol. Res. Lab. For Nuclear Reactors
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