Abstract
Spherical and nano-sized hydroxyapatite (HAp) was synthesized from calcium oxide by a continuous rapid precipitation method without using any secondary route. The maximum particles have a size around 10 nm according to X-ray diffraction (XRD), 35 nm based on scanning electron microscopy (SEM) and 15 nm according to transmission electron microscopy (TEM) studies. The sintering effects on structural properties of HAp were studied by XRD, Fourier transformation infrared (FTIR), 31P solid-state nuclear magnetic resonance (NMR) and Raman spectroscopy. The particle size varied from 5 to 70 nm and nanopores from 10 to 450 nm were revealed by SEM and transmission electron microscopy TEM. This result was also strongly supported by XRD study. The combined effect of heating and centrifuging force exerted by vigorous magnetic stirring causes the dispersion of tiny crystals followed by precipitation to form spherical shaped particles. The chemical structure of HAp was established by FTIR, NMR and Raman spectroscopy.
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Pramanik, S., Kar, K.K. Nanohydroxyapatite synthesized from calcium oxide and its characterization. Int J Adv Manuf Technol 66, 1181–1189 (2013). https://doi.org/10.1007/s00170-012-4401-z
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DOI: https://doi.org/10.1007/s00170-012-4401-z