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균일한 Hydroxyapatite Sphere 제조 및 특성분석
이강혁,신동근,권우택,김형순,김희래,김영희,김수룡,Lee, Kang Huk,Shin, Dong Geun,Kwon, Woo Teck,Kim, Hyungsun,Kim, Hee Rae,Kim, Younghee,Kim, Soo Ryong 한국세라믹학회 2014 한국세라믹학회지 Vol.51 No.3
A hydroxyapatite microsphere was prepared using a spray-drying method. The change in the shape as a function of the slurry concentration and the change in the degree of shrinkage according to the heat-treatment temperatures were observed. To obtain biomaterials with improved bio-stability, $CaHPO_4{\cdot}2H_2O$ and $Ca(OH)_2$ were mixed at a ratio of 6 : 4 and then ball-milled to synthesize hydroxyapatite. The hydroxyapatite microsphere was prepared using 30 wt% ~ 80 wt% hydroxyapatite slurry by a spray-drying method. For concentrations lower than 50 wt% or higher than 80 wt%, doughnut-shaped microspheres were produced. However, perfect microspheres were produced when using slurry concentrations of 50 wt% ~ 70 wt%. A dense microstructure was observed after a heat treatment at temperatures higher than $1100^{\circ}C$ and the size was reduced by 24.3% at these temperatures.