Abstract
12CaO · 7Al2O3 (C12A7) composed of nanosize cage structure can clathrate oxygen radicals (O-) and has a high potential to application of strong oxidizing catalysts. In the present report, we demonstrate a fabrication route to C12A7 fine powders by Chemical Solution Deposition method and subsequent ball milling in order to enhance the catalytic reactivity. Aluminum sec-butoxide, calcium nitrate tetrahydrate, acetylacetone, 2-methoxyethanol, and nitric acid were used as raw materials. Precursor solution was dried and annealed at 900°C in O2 atmosphere. BET specific surface area of the powders revealed the C12A7 obtained by the solution process showed higher specific surface area than that of the conventional sintering process even though they were milled in the same manners. The reason for this difference may be that the disintegration effect was applied for the solution derived sample rather than the grinding.
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