アロフェン成形体の水酸化ナトリウム水熱処理によるゼオライト化

概要

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Zeolite A compacts were directly prepared from allophane compacts, having a columnar shape with the size of 5.8 mm in diameter and 4.4 mm in length, through hydrothermal reaction with NaOH solution of 3 mol・dm^<-3> at 80℃. After the hydrothermal reaction, the allophane transformed to zeolite A and then the shape of compacts has been maintained. The crystallization rate of zeolite A on the surface of compacts was faster than that in the internal part. An aging treatment leaded to reduce a difference in crystallization rate between the surface and the internal part of compacts. The crystal morphology of zeolite A on the surface exhibits cubic shape consisting of {100} plane. On the other hand, {100} and {110} planes appeared on the crystal occurring formed in the internal part.
日本粘土学会の論文
2004-12-16