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J. Korean Ceram. Soc. > Volume 50(4); 2013 > Article
Journal of the Korean Ceramic Society 2013;50(4): 275.
doi: https://doi.org/10.4191/kcers.2013.50.4.275
Precipitation of Calcium Phosphate at pH 5.0 for the β Tri-calcium Phosphate Cement
Myung Chul Chang
Department of Materials Science and Engineering, Kunsan National University
ABSTRACT
The purpose of this study was to prepare calcium phosphate cement [CPC] for use in artificial bone. Nano-crystalline calcium phosphate [CaP] was precipitated at $37^{circ}C$ using highly active $Ca(OH)_2$ in DI water and an aqueous solution of $H_3PO_4$. From the XRD measurements, the nano-CaP powder was close to apatitic TCP phase and the powders fired at $800^{circ}C$ showed a critical ${beta}$-TCP phase. A mixture of one mole $CaCO_3$ and two moles di-calcium phosphate was calcined at $1100^{circ}C$ to make a reference ${beta}$-TCP material. The nano-CaP powders were added to the normal ${beta}$-TCP matrix and fired at $900^{circ}C$ to make a ${beta}$-TCP block. The sintered block showed improved mechanical strength, which was caused by the solid state interaction between nano-CaP and normal ${beta}$-TCP.
Key words: Tricalcium phosphate, Bone cement, Nano-Particles, Precipitation, Solid state interaction
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