Jo, Y.-C. Youm, M.-R. Yun, S.-I. Cho, G.-S. Park, S.-W. 2024-01-20T11:04:42Z 2024-01-20T11:04:42Z 2021-09-02 2013-11 1229-7801 https://pubs.kist.re.kr/handle/201004/127518 The objective of this study was to develop a synthesis process for β-SiC powders to reduce the synthesis temperature and to control the particle size and to prevent particle agglomeration of the synthesized β-SiC powders. A phenol resin and TEOS were used as the starting materials for the carbon and Si sources, respectively. SiO2-C hybrid precursors with various C/Si mole ratios were fabricated using a conventional sol-gel process. β-SiC powders were synthesized by a carbothermal reduction process using SiO2-C hybrid precursors with various C/Si mole ratios (1.6 ~ 2.5) fabricated using a sol-gel process. In this study, the effects of excess carbon and the addition of Si powders to the SiO2-C hybrid precursor on the synthesis temperature and particle size of β-SiC were examined. It was found that the addition of metallic Si powders to the SiO2/C hybrid precursor with excess carbon reduced the synthesis temperature of the β-SiC powders to as low as 1300°C. The synthesis temperature for β-SiC appeared to be reduced with an increase of the C/Si mole ratio in the SiO2-C hybrid precursor by a direct carburization reaction between Si and excess carbon. ？ 2013 The Korean Ceramic Society. Korean Direct carburization Hybrid precursor Metallic silicon Particle agglomerations Powder synthesis SiC Synthesis process Synthesis temperatures Carbon Carbothermal reduction Fabrication Particle size Powders Silicon Silicon oxides Sol-gel process Synthesis (chemical) Silicon carbide Effects of metallic silicon on the synthsis of β-SiC Powders by a Carbothermal Reduction Using SiO2-C hybrid precursor fabricated by a Sol-gel process Article 10.4191/kcers.2013.50.6.402 1 Journal of the Korean Ceramic Society, v.50, no.6, pp.402 - 409 Journal of the Korean Ceramic Society 50 6 402 409 scopus kci ART001823697 2-s2.0-84893794854 Article Direct carburization Hybrid precursor Metallic silicon Particle agglomerations Powder synthesis SiC Synthesis process Synthesis temperatures Carbon Carbothermal reduction Fabrication Particle size Powders Silicon Silicon oxides Sol-gel process Synthesis (chemical) Silicon carbide Carbothermal reduction Powder synthesis SiC Silicon carbide Sol-gel process