Effect of the C/Si Molar Ratio on the Characteristics of β-SiC Powders Synthesized from TEOS and Phenol Resin
- Effect of the C/Si Molar Ratio on the Characteristics of β-SiC Powders Synthesized from TEOS and Phenol Resin
- 염미래; 박상환; 김영욱
- Silicon carbide; Powder synthesis; Tetraethylorthosilcate (TEOS); Carbothermal reduction; Sol-gel process
- Issue Date
- 한국세라믹학회지; Journal of the Korean Ceramic Society
- VOL 50, NO 1, 31-36
- β-SiC powders were synthesized by a carbothermal reduction process using SiO2-C precursors fabricated by a sol-gel process using phenol resin and TEOS as starting materials for carbon and Si sources, respectively. The C/Si molar ratio was selected as an important parameter for synthesizing SiC powders using a sol-gel process, and the effects of the C/Si molar ratio (1.4-3.0) on the particle size, particle size distribution, and yield of the synthesized β-SiC powders were investigated. It was found that (1) the particle size of the synthesized β-SiC powders decreased with an increase in the C/Si molar ratio in the SiO2-C hybrid precursors, (2) the particle size distribution widened with an increase in the C/Si molar ratio, and (3) the yield of the β-SiC powder production increased with an increase in the C/Si molar ratio.
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