Synthesis of Nano-Sized SiC Powders by Carbothermal Reduction

Abstract:

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Nano sized SiC powder was successfully synthesized by the carbothermal reduction in SiO2. Precursor for SiC was prepared by using phenolic resin as a carbon source and ethylsilicate as a silicon source. After mixing, hydrolysis, drying and pyrolysis at 1000°C, SiC precursor consisted of C and SiO2 was obtained. The precursor was heat treated at 1500-1800°C in Ar to synthesize SiC by the carbothermal reduction. The carbothermal redction reaction was almost completed at 1700°C and then SiC particle with suitable size was obtained at this temperature. Nano-sized SiC particles could be achieved at 1600 °C, and unreacted SiO2 and C remained in the sample. Pure SiC particles were obtained by oxidation and acid treatment. Nano-sized SiC powder had the diameter of 10-20 nm and BET surface area of 156 m²/g.

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Periodical:

Edited by:

Katsutoshi Komeya, Yi-Bing Cheng, Junichi Tatami and Mamoru Mitomo

Pages:

211-214

DOI:

10.4028/www.scientific.net/KEM.403.211

Citation:

Y. Yoshioka et al., "Synthesis of Nano-Sized SiC Powders by Carbothermal Reduction", Key Engineering Materials, Vol. 403, pp. 211-214, 2009

Online since:

December 2008

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$35.00

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