Synthesis And Characterization Of Mg-Substituted Biphasic Calcium Phosphate
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Date
2019-08-01
Authors
Mohd. Moslim, Nur Atiqqah
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
Sample without magnesium (Mg) and Mg-substituted biphasic calcium phosphate
(BCP) were synthesized through precipitation method at room temperature. The
substitution of Mg in BCP were considered due to Mg being one of the main element
found in human bones. Hence, this study emphasize more on the effect of Mg
substitutions towards phase formations with regards to three parameters which are the
concentration of Mg ions, the molar ratio between precursors, and the calcination
temperature. The as-synthesized sample without Mg BCP shows the formation of
monetite and hydroxyapatite (HA) phase while the Mg-substituted BCP show only HA
phase exist. As for the calcined BCP powders at 600 °C, both without Mg and
Mg-substituted samples shows biphasic formation of HA and beta-tricalcium phosphate
(β-TCP). BCP with the highest Mg ions concentration exhibit the highest β-TCP phase
formation (75.3 wt %) while the without substituted BCP sample has the lowest β-TCP
formation (20.5 wt %). It shows an increasing trend of β-TCP phase with the increase
of Mg concentration. The different molar ratio between precursors does not give subtle
effect on the phase formations as compared to the effect of Mg concentrations. BCP
powders calcined at lower temperature of 500 °C shows less formation of β-TCP phase
when compared to sample calcined at 600 °C. This results proved that the phase
transition of BCP from HA to β-TCP were enhanced when subjected to high
calcination temperature.