Novel synthesis and characterization of silicon carbide nanowires on graphite flakes

被引：109

作者：

Ding, Jun ^{[1
]}

Deng, Chengji ^{[1
]}

Yuan, Wenjie ^{[1
]}

Zhu, Hongxi ^{[1
]}

Zhang, Xiaojun ^{[1
]}

机构：

[1] Wuhan Univ Sci & Technol, State Key Lab Breeding Base Refractories & Ceram, Wuhan 430081, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2014年 / 40卷 / 03期

关键词：

Silicon carbide nanowires; Graphite; Molten salt; Synthesis; SIC NANOWIRES; SOL-GEL; MOLTEN-SALT; CARBOTHERMAL REDUCTION; COATED GRAPHITE; PARTICLES; ADDITIVES; EMISSION; WHISKERS; SURFACE;

D O I：

10.1016/j.ceramint.2013.08.051

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Silicon carbide nanowires were synthesized on the surface of graphite by partially reacting with silicon powders in NaF-NaCl based salt at 1150-1400 degrees C in argon. The effects of temperature and time of heat treatment as well as Si/graphite ratio on synthesis of SiC nanowires were studied. The results showed that the formation of SiC nanowires started at about 1200 degrees C, and the amounts of SiC nanowires increased in the resultant powders with increasing temperature. Their morphologies were characterized by scanning electron microscopy and high-resolution transmission electron microscopy. It was found that beta-SiC nanowires with diameter of 10-50 nm and various lengths grew along their preferred direction perpendicular to (111). The zeta potential of graphite was also increased after coating with silicon carbide nanowires. SiC nanowires that formed on the graphite surface acted as an anti-oxidant to a certain extent, and they protected the inner graphite from oxidation. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：4001 / 4007

页数：7

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