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

被引：73

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

页码：202 / 210

页数：9

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