Synthesis and properties evaluation of sintered bioglass based on 58% SiO₂ - 38% CaO - 4% P₂O₅

Abstract

In this study, 58% SiO₂ - 38% CaO - 4% P₂O₅ bio-glass was synthesised using sol-gel method, pressed into pellets and sintered at three different temperature i.e. 600⁰C, 800⁰C and 1000⁰C. The effect of different sintering temperature on physical, structural and bioactivity properties were investigated using XRD, SEM, FTIR, XRF and TGA/DTA. From this study, it has been found out that by increasing the sintering temperature, the corresponding Si-O-Si bonds also increases in intensity. The increase in the Si-O-Si bond increases the bridging oxygen bonds which is responsible for the crystallinity of the glass. Besides that, the Si-OH bonds is also found to be decreased in intensity which corresponds hydroxyapatite formation. Thus, all these factor affects the bio-activity as the increase in sintering temperature will decrease the bioactivity (less apatite formation).