| Effect of Calcination on Microstructure Development
and Properties of Hydroxyapatite Powders Extracted
from Human and Bovine Bones |
Kerim Emre Öksüz,1, * Seyran Kilinç2 and Ali Özer1
Pages : 41-45
DOI : 10.1080/0371750X.2019.1588170 |
| Abstract |
| This study represents a comprehensive discussion of hydroxyapatite (HAp)
formation from human and bovine bones. The phase formation and surface
morphologies of prepared HAp powders were determined by XRD and SEM
analyses, respectively. TEM was employed to understand the internal compositions
with high magnifications and particle size. FT-IR characterizations provided
information about molecular interactions and structures. In order to understand
the effect of heat treatment at different temperatures and ultimately to get the
desired morphology/particle size of the HAp powders derived from human and
bovine, the powder samples were calcined at 700o to 1100oC with an interval of
100oC. At 700oC, the organic components were removed and finally, a carbonate
apatite was obtained. The degree of crystallinity and crystallite size were noticed
to increase progressively with calcination temperature. The overall results showed
that the calcination temperature highly influenced the properties of HAp powders
derived from human and bovine bone samples. As expected, higher temperatures
led to more pure form of HAp with higher degree of crystallinity, larger crystallite
size, and a less porous structure. Besides, the human bone structure, in contrary
to the bovine bone, did not show temperature sensitivity by means of crystallite
size increase.
[Keywords: Calcination, Hydroxyapatite, Chemical and structural properties] |
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