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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.118  No.1377 (May) (2010)  >  pp.345-348

Journal of the Ceramic Society of Japan
<<Previous article Vol.118  No.1377 (May) (2010)   pp.345 - 348 Next article>>

Synthesis of SiC nano-powders from liquid carbon and various silica sources

Yoshiki YOSHIOKA1), Mikio KONISHI1), Hidehiko TANAKA2), Toshiyuki NISHIMURA2) and Yoshio SAKKA2)
1) New Technology Research Laboratory, Sumitomo Osaka Cement Co. Ltd.
2) Nano Ceramics Center, National Institute for Materials Science


  The precursors of SiC powders were fabricated from various silica and phenolic resin sources of Si and C. The silica particles were 3.7 µm to 34 nm in size, and much finer silica was obtained from a liquid tetraethoxysilane oligomer. Silica and phenolic resin mixtures were cured and carbonized to form SiC precursors, and fine SiC powders were synthesized by carbothermic reaction of the precursors at 1600–2000°C. Powders with a grain size of 10–30 nm were synthesized at 1600°C from liquid silica and C. Dispersed SiC powder in water had primary grain size of 10–30 nm. SiC yield was higher from precursors having higher C/Si ratios. The carbon dispersion on fine-grain SiO2 was important in fabricating the SiC nano-powders.


Keyword:
SiC, Powders-chemical preparation, Grain size, Refractories, Microstructure-final

Received: November 05, 2009
Accepted: March 23, 2010 , Published online: May 01, 2010
Copyright (c) 2010 The Ceramic Society of Japan

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