| 摘要 |
PURPOSE:To obtain hydroxyapatite having fine particle size, high uniformity and purity with simple apparatus and operation under mild condition in a short time, by producing an aqueous slurry containing CaCO3 powder and CaHPO4(.2 H2O) powder at a specific ratio and reacting the slurry under grinding and mixing with a wet pulverizer. CONSTITUTION:CaCO3 powder and CaHPO4 are dispersed in water at a Ca/P atomic ratio of 1.5-1.67 to obtain an aqueous slurry having a concentration of 5-40wt%. The slurry is made to react at 20-50 deg.C for 30min-5hr under grinding and mixing with a wet pulverizer such as ball mill, colloid mill, etc., to obtain the objective hydroxyapatite useful as a material to be used in a living body, a filler for column of liquid chromatography, a humidity sensor, etc.
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