Synthesis and characterization of SiC nano powder with low residual carbon processed by sol–gel method
2012
Najafi, A. | Fard, F Golestani | Rezaie, H.R. | Ehsani, N.
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 β-SiC particle morphology were evaluated at 1500°C. The synthesis process of β-SiC nanopowders was completed at 1500°C after 1h while β-SiC nanowhiskers were heterogeneously nucleated and grown from obtained nanopowders after 2–3h. The detected free carbon content in whiskers was less than 1% after 3h.
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