沈殿法及び水熱法による板状β-Co(OH)_2結晶の合成

概要

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Hexagonal β-Co(OH)_2 platelets with high crystallinity (0.3-10μm in average diameter and 〜5 in aspect ratio) have been synthesized. The platelets of 0.3-0.5μm in diameter were prepared by a precipitation method, and their sizes were affected by the cobalt ion concentration in the suspensions. Adding rate of precipitant, stirring rate of solution, and aging temperature gave little effect on their morphologies. The platelets with well developed facets were synthesized with high reproducibility, when chloride salt was used as a Co-source and the suspension was aged at room temperature for 86.4 ks. The platelets have been enlarged up to 5-10μm with maintaining morphology (hexagonal shape, 〜5 in aspect ratio) by hydrothermal treatment (at 393 K for 86.4 ks in 12 mol/dm^3 NaOH aqueous solution).
社団法人日本セラミックス協会の論文
2002-12-01