Structural studies of bioactive sol-gel phosphate based glasses
UNSPECIFIED (2005) Structural studies of bioactive sol-gel phosphate based glasses. In: 9th International Conference on the Structure of Non-Crystalline Materials (NCM9), JUL 11-15, 2004, Alfred Univ, Corning, NY.Full text not available from this repository.
Phosphate based glasses have attracted great interest because of their application as bioresorbable materials. Because of their solubility in body fluid they can be used as degradable temporary implants for hard and soft tissue replacement and augmentation. In the present work, glasses with a composition of 45% P2O5, 35% CaO, 25Yo Na2O have been synthesised using the sol-gel method. Gels were obtained using OP(OR)(x)(OH)(3-x) (x = 1, 2) as phosphorus precursor and alcoxides of calcium and sodium in ethylene glycol. Gels remained amorphous up to a calcination temperature of 400 degrees C At higher temperature, crystalline gamma-Ca2P2O7 was identified A comparison between the structure of the synthesised sol-gel glass and the structure of an analogue glass generated via the conventional melt quenching method has been performed A broad based characterisation approach combining many techniques (x-ray diffraction, thermal analysis, infrared spectroscopy, P-31 solid state NMR spectroscopy, P L-edge XANES) has been used. The structure of sol-gel, and its melt quenched analogue, is mainly formed by chains of (PO4)(3-) tetrahedral sharing two bridging oxygen (i.e. methaphosphate units).
|Item Type:||Conference Item (UNSPECIFIED)|
|Subjects:||Q Science > QD Chemistry
T Technology > TP Chemical technology
|Journal or Publication Title:||PHYSICS AND CHEMISTRY OF GLASSES|
|Publisher:||SOC GLASS TECHNOLOGY|
|Number of Pages:||7|
|Page Range:||pp. 365-371|
|Title of Event:||9th International Conference on the Structure of Non-Crystalline Materials (NCM9)|
|Location of Event:||Alfred Univ, Corning, NY|
|Date(s) of Event:||JUL 11-15, 2004|
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