발간논문

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Vol.36, No.8, 1297 ~ 1304, 1998
Title
The Preparation of Al2O3-SiC Composite powder by Self - Propagating High - Temperature Synthesis method
안찬영 , 윤기석 , 고석권 , 원창환 Chan Young An , Ki Seok Yun , Seok Kwon Ko , Chang Whan Won
Abstract
The Al₂O₃-SiC composite powder was prepared by Self-propagating High-Temperature Synthesis(SHS) process using SiO₂ powder as raw material instead of silicon. Aluminum powder was used as reducing agent of SiO₂ and graphite was used as carbon source. The effects of the molar ratio in raw material, compaction pressure, initial temperature of reactants on the products and combustion process were studied. Self-propagating high temperature synthesis of SiO₂/Al/C system should be preheated above 400℃. As the result of the combustion reaction, the purity of final product became better than that of reactants. When Al₂O₃-SiO₂ prepared from SiO₂/Al/C system, the optimum molar ratio of SiO₂ : Al : C was 3.0 : 4.0 : 6.0. The free carbon was removed by roasting at 650℃ for 30min.
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