Synthesis and characterization of SiC nano powder with low residual carbon processed by sol-gel method

被引：74
作者：
Najafi, A. [1 ]
Fard, F. Golestani [1 ,2 ]
Rezaie, H. R. [1 ,2 ]
Ehsani, N. [1 ]
机构：
[1] Iran Univ Sci & Technol, Sch Met & Mat Engn, Tehran 16844, Iran
[2] Iran Univ Sci & Technol, Ctr Excellence Adv Mat, Tehran 16845195, Iran
来源：
POWDER TECHNOLOGY | 2012年 / 219卷
关键词：
Nanostructured materials; Sol-gel processes; Chemical synthesis; Scanning electron microscopy (SEM); Transmission electron microscopy (TEM); SILICON-CARBIDE; CARBOTHERMAL REDUCTION; PRECURSORS; NANOPARTICLES; NANOWIRES;
D O I：
10.1016/j.powtec.2011.12.045
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Silicon carbide nanopowders and nanowhiskers were synthesized using phenolic resin and silicon alkoxide as precursors through sol-gel process with atomic ratio of C/Si = 1.8 in water-solvent-catalyst-dispersant system. The effects of soaking time on free carbon content and synthesized beta-SiC particle morphology were evaluated at 1500 degrees C. The synthesis process of beta-SiC nanopowders was completed at 1500 degrees C after 1 h while beta-SiC nanowhiskers were heterogeneously nucleated and grown from obtained nanopowders after 2-3 h. The detected free carbon content in whiskers was less than 1% after 3 h. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：202 / 210
页数：9
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