TY - GEN
T1 - Effect of super saturation level on the size and morphology of hydroxyapatite precipitate
AU - Prakash, K. H.
AU - Ooi, C. P.
AU - Kumar, R.
AU - Khor, K. A.
AU - Cheang, P.
PY - 2006
Y1 - 2006
N2 - Hydroxyapatite (HA) is synthesized through acid-base reaction by adding an aqueous solution of orthophosphoric acid to an aqueous solution of calcium hydroxide maintained at 40, 80 and 100°C. X-ray diffraction of the precipitate particles revealed HA as the predominant phase in all the temperatures and that the morphology of the particles changed from needle-shaped at 40°C to spheroid at 100°C. The changes in the morphology with temperature were analyzed taking into account the driving force for the HA precipitation and the super saturation level of Ca2+ and PO 43- ions with respect to HA. It appears that the effect of temperature on morphology is less pronounced compared to that of super saturation level. The analysis also indicated that the super saturation level of the reactants, especially the concentration of Ca2+ ions, played a predominant role on the precipitate morphology for this classical acid-base reaction.
AB - Hydroxyapatite (HA) is synthesized through acid-base reaction by adding an aqueous solution of orthophosphoric acid to an aqueous solution of calcium hydroxide maintained at 40, 80 and 100°C. X-ray diffraction of the precipitate particles revealed HA as the predominant phase in all the temperatures and that the morphology of the particles changed from needle-shaped at 40°C to spheroid at 100°C. The changes in the morphology with temperature were analyzed taking into account the driving force for the HA precipitation and the super saturation level of Ca2+ and PO 43- ions with respect to HA. It appears that the effect of temperature on morphology is less pronounced compared to that of super saturation level. The analysis also indicated that the super saturation level of the reactants, especially the concentration of Ca2+ ions, played a predominant role on the precipitate morphology for this classical acid-base reaction.
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U2 - 10.1109/NANOEL.2006.1609744
DO - 10.1109/NANOEL.2006.1609744
M3 - Conference contribution
AN - SCOPUS:33750837188
SN - 0780393589
SN - 9780780393585
T3 - NanoSingapore 2006: IEEE Conference on Emerging Technologies - Nanoelectronics - Proceedings
SP - 345
EP - 349
BT - NanoSingapore 2006
T2 - 2006 IEEE Conference on Emerging Technologies - Nanoelectronics
Y2 - 10 January 2006 through 13 January 2006
ER -