Abstract
Hydroxyapatite (HA) of Ca(I)4Ca(II)6(PO4)6(OH)2 is a biomaterial that is currently being developed for several biomedical applications, such as for the reconstruction of hard tissues of human bones and teeth. HA can be synthesized from raw materials that are easily found in large quantities in the world, such as eggshells. However, due to its low mechanical properties, the doping of metal ions of Mg in its structure is needed to improve the physical properties of HA. Five sets of HA-Mg composites with HA synthesized from eggshells and various MgO concentrations of 0.25, 0.50, 0.75, and 1.00 mol% were prepared by the hydrothermal method at 90 °C for 24 h to observe the effect of the amount of Mg doping on the structural, morphological, and mechanical properties of HA-Mg composites. Doping of Mg ion in HA has increased the secondary phase formation of whitlockite and enlarged the hardness value. The maximum hardness value of 88.7 HV was obtained from the highest Mg concentration of 1.00 mol%.
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