Abstract
In this research, nanosized hydroxyapatite (HA) ceramics with high hardness at moderate temperature were prepared using a novel peroxide-based route (PBR) using calcium nitrate, phosphoric acid and hydrogen peroxide as starting materials. Single-phase HA with an average particle size of approximately 10–30nm and a BET surface area of 23.54m2/g were obtained after calcination at 800°C for 2h. Dense HA ceramics with a density of 98%, a grain size of 0.91µm and a Vickers hardness of 5.67GPa were achieved after sintering the HA pellet at 1,200°C. Their biocompatibility might be anticipated by SEM images of apatite layer formation after immersion in simulated body fluid (SBF) for 14 days.
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