| 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 |
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| ABSTRACT |
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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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