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J. Korean Ceram. Soc. > Volume 48(3); 2011 > Article
Journal of the Korean Ceramic Society 2011;48(3): 217.
doi: https://doi.org/10.4191/kcers.2011.48.3.217
실리카를 함유하지 않는 생체활성 칼슘인산염 글라스-세라믹스의 합성 및 특성
송창원, 이주혁, 양태영, 윤석영, 박홍채
부산대학교 재료공학부
Preparation and Characteristics of Bioactive Silica-free Calcium Phosphate Glass-ceramics
Chang-Weon Song, Joo-Hyeok Lee, Tae-Young Yang, Seog-Young Yoon, Hong-Chae Park
School of Materials Science and Engineering, Pusan National University
Glass-ceramic materials, which consist of glass matrix phase containing crystalline ${beta}-Ca_3(PO_4)_2$ and ${beta}-Ca_2P_2O_7$, have been prepared by heating at $750-900^{circ}C$ of calcium phosphate invert glasses in the silica-free $CaO-P_2O_5-TiO_2-Na_2O$, system. With increasing heating temperature from 750 to $900^{circ}C$, the crystallite size of precipitated ${beta}-Ca_3(PO_4)_2$ in glass with $55CaO{cdot}35P_2O_5{cdot}3TiO_2{cdot}7Na_2O$ (mol%) composition increased from 48 to 91 nm. With the extension of the immersion time in dilute acetic acid solution (pH = 5) to ${geq}$200 min, the degree of dissolution of $Ca^{2+}$ and $P^{5+}$ ions in the glass-ceramics was linearly increased and the solution was constantly maintained at pH = ~7. Biomimetic nanostructured (62-88 nm in average dia.), sphere-shaped hydroxyapatite was homogeneously formed on the surface of the glass-ceramics when socked for 7-14 days in a Hanks' solution, indicating bioactivity of the prepared glass-ceramics.
Key words: Calcium phosphate invert glasses, Hanks' solution, Nanostructured, Hydroxyapatite, Bioactivity
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