METHOD FOR PRODUCING SILICA RAW MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a new method for producing, from rice chaff, a silica raw material which is suitable as a raw material for producing various silicon compounds, especially silicon containing ceramics. SOLUTION: The silica raw material is produced by treating rice chaff powder with compressed hot water of 150 to 450 deg.C for at least 30 s. The contents of a silica component and an organic component contained in the produced silica raw material are controlled by controlling the reaction temperature and the reaction time.