Kim, Gyu-Mi Cho, Gyung-Sun Lim, Dea-Soon Park, Sang-Whan 2024-01-20T19:04:32Z 2024-01-20T19:04:32Z 2021-09-02 2010-06 1229-9162 https://pubs.kist.re.kr/handle/201004/131413 Single phase beta-SiC powders were synthesized using SiO2/C hybrid precursors with and without the addition of metallic Si powders. The SiO2/C hybrid precursors with various C/Si mole ratios (1.6-4.0) were prepared by a sol-gel process using tetraethyl orthosilicate and phenol resin as starting materials. Fine beta-SiC powders were synthesized by the carbothermal reduction of the SiO2/C hybrid precursor with and without the addition of metallic Si powders in the temperature range between 1250 degrees C-1800 degrees C under a vacuum atmosphere. Single phase beta-SiC powders were obtained by the carbothermal reduction of the SiO2/C hybrid precursor with a C/Si mole ratio of 1.6 above 1600 degrees C under a vacuum atmosphere. It was found that the addition of metallic Si powders to the the SiO2/C hybrid precursor with excess carbon reduced the temperature for the synthesis of single phase beta-SiC powders to as low as 1350 degrees C. The particle sizes of synthesized beta-SiC powders from the metallic Si powder added SiO2/C hybrid precursor with excess carbon were less than 1 mu m, in which fine beta-SiC powders appeared to be slightly aggregated. English KOREAN ASSOC CRYSTAL GROWTH, INC SILICON-CARBIDE POWDERS CARBOTHERMAL REDUCTION The effects of metallic Si addtions on the synthesis of beta-SiC powders using a sol-gel method Article 1 JOURNAL OF CERAMIC PROCESSING RESEARCH, v.11, no.3, pp.377 - 383 JOURNAL OF CERAMIC PROCESSING RESEARCH 11 3 377 383 scie scopus kci 000280125600020 2-s2.0-77958157098 Materials Science, Ceramics Materials Science Article SILICON-CARBIDE POWDERS CARBOTHERMAL REDUCTION Synthesis SiC powder Sol-gel carbothermal