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http://dx.doi.org/10.4191/kcers.2014.51.3.145

Preparation and Characterization of Homogeneous Hydroxyapatite Sphere  

Lee, Kang Huk (Energy Efficient Materials Team, Korea Institute of Ceramic Engineering and Technology)
Shin, Dong Geun (Energy Efficient Materials Team, Korea Institute of Ceramic Engineering and Technology)
Kwon, Woo Teck (Energy Efficient Materials Team, Korea Institute of Ceramic Engineering and Technology)
Kim, Hyungsun (School of Materials Engineering, Inha University)
Kim, Hee Rae (Lidox Bio Co. Ltd.)
Kim, Younghee (Energy Efficient Materials Team, Korea Institute of Ceramic Engineering and Technology)
Kim, Soo Ryong (Energy Efficient Materials Team, Korea Institute of Ceramic Engineering and Technology)
Publication Information
Journal of the Korean Ceramic Society / v.51, no.3, 2014 , pp. 145-149 More about this Journal
Abstract
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.
Keywords
Hydroxyapatite; Sphere; Spray drying; Bio stability;
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