Synthesis And Characterization Of Mg-Substituted Biphasic Calcium Phosphate
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 eff...
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| 格式: | Thesis |
| 语言: | English |
| 出版: |
2019
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| 主题: | |
| 在线阅读: | http://eprints.usm.my/55397/1/Synthesis%20And%20Characterization%20Of%20Mg-Substituted%20Biphasic%20Calcium%20Phosphate_Nur%20Atiqqah%20Mohd.%20Moslim.pdf |
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| 总结: | 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. |
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