A novel hydroxyapatite/sodium alginate biocomposite doped with magnesium was developed to enhance the physical, mechanical and bioactivity properties in bone implant applications. Specifically, magnesium was doped in hydroxyapatite (HA) (Ca10(PO4)6(OH)2/sodium alginate (SA) (NaC6H7O) by using precipitation method. This research also explored the effects of magnesium doping on HA/SA samples. The prepared powder was uniaxially pressed and sintered at 1300°C. The characterisation of Mg-doped HA/SA at various concentration ranging from 0.5 wt-% to 1.5 wt-% were performed through Field Emission Scanning Electron Microscopy (FESEM) analysis. The maximum relative density and hardness of Mg-doped HA/SA were fixed at 92% and 4.11 GPa respectively and at 1.0 wt-% for samples of magnesium doping. Based on the microstructure analysis by FESEM it is evident that the elements were distributed evenly in Mg-doped hydroxyapatite/sodium alginate (HA/SA). These results proved that the Mg doping increased the physical, mechanical and bioactivity properties of HA/SA biocomposite.
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