Abstract
In this work, powders of the composition (CaO 46- SiO2 34- P2O5 14.5- MgO 4- CaF2 1- MgF2 0.5) (wt. %) were thoroughly mixed and melted in a muffle furnace. The melt was quenched in water to form glass. Three glass-ceramics were prepared by sintering glass samples at three different temperatures 850, 900 and 950 degrees C according to the exothermal peaks of DTA. The DTA peaks correspond to the bioactive crystalline phases hydroxyapatite(HA) and wollastonite as confirmed by the XRD data. Study of diameter-shrinkage co-efficient and bulk-density of samples revealed higher densification rate for the range 900 - 950 degrees C than that for the range 850 - 900 degrees C SEM and optical microscope results illustrated a tendency towards closely packed structure and increasing grain size with the increase of sintering temperature. The samples were immersed in SBF for 30 days at room temperature for in-vitro evahtation EDS analysis, showing the presence of carbon(C) along with calcium(Ca) and phosphorus(P) suggests the formation of hydroxycarbonate-apatite(HCA) phase that indicates the bioactivity of the material which increases with the increase of sintering temperature.