| 학회 |
한국재료학회 |
| 학술대회 |
2015년 봄 (05/14 ~ 05/15, 구미코) |
| 권호 |
21권 1호 |
| 발표분야 |
B. 바이오/화학 재료 |
| 제목 |
Synthesis of hydroxyapatite from single crystals of calcium compounds |
| 초록 |
Control of morphology of hydroxyapatite (HAp, Ca10(PO4)6(OH)2) is one of very important prospects on development of bioactive ceramic materials. Hydrothermal processing has been the subject of much attention for HAp synthesis because it allows formation of HAp crystals with various morphology. Morphology of HAp formed through the hydrothermal processing depends on the solubility of starting materials because the growth of HAp crystals is decided by dissolution of starting materials. In the previous reports, the possibility of orientation of HAp crystals was shown. The orientation of HAp crystals could be formed by the homogeneous dissolution from single crystal of calcite. The purpose of the present study is to investigate feasibility of well-crystallized HAp crystals with controlled morphology from single crystals of various calcium compounds through a hydrothermal processing. Single crystals of calcium compounds such as calcite (CaCO3), fluorite (CaF2), calcium tartrate tetrahydrate (Ca(C4H4O6)•4H2O) were examined. The single crystals were applied to hydrothermal treatment in a phosphate solution for 24 h. Needle-shaped HAp formed on the surface of calcite. Oriented structure of the needle-shaped HAp was constructed on {104} planes of calcite single crystal after hydrothermal treatment. Plate-shaped HAp formed on the fluorite while aggregation of nano-sized HAp on the calcium tartrate tetrahydrate was observed after the hydrothermal processing. The difference in the solubility of the starting materials well affected the morphology of HAp formed on their surfaces under the hydrothermal condition, and thus the specific dissolution rate of calcium compound allowed orientation of the needle-shaped HAp crystals. |
| 저자 |
Ill Yong Kim, Koichi Kikuta, Chikara Ohtsuki
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| 소속 |
Nagoya Univ. |
| 키워드 |
Hydrothermal processing; Single crystal; Solubility; Morphology
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| E-Mail |
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