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Vol.39, No.6, 684 ~ 691, 2001
Title
Research Papers / Powder Metallurgy : Study on the Reaction Parameter as SiC Powder Preparation by Combustion Synthesis
정중채Jung Chae Jeong,신봉문Bong Moon Shin
Abstract
Silicon carbide was synthesized by a combustion synthesis process using exothermic mixture of Mg and (-C₂F₄-) as an activated additive, silicon and carbon. Silicon carbide was synthesized differently with the addition of the activated additive. Especially, with 25wt.% of the additive, better conversion of Si to SiC was obtained. For the types of carbon, it was observed that carbon black and activated carbon showed better reactivity than graphite. In regard of the molar ratio change, when the molar ratio of silicon vs. carbon was 1:2, Si was converted to silicon carbide completely. Among the products, MgF₂ was entirely removed by leaching for 4hrs. at a mixture of 10vol.%(HNO₃+HF)+90% water.
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