2012 年 26 巻 p. 91-94
Morphological control of hydroxyapatite (HAp) is very difficult because this compound has very low solubility. However, CaCO3, a calcium salt with the same insolubility, dissolves easily in solutions containing CO2. Therefore, HAp was easily dissolved by CO2 blowing into the HAp suspension. The dissolution amount was 200 times that found without CO2 blowing. Thus, a high-concentration HAp solution could be prepared through the simple process of CO2 blowing. Moreover, flower-like HAp particles were deposited by outgassing the dissolved CO2 in the HAp solution under heating.