Abstract
Glasses of composition (60–x)NaPO3-25B2O3-xCaF2-15MgO, where x = 2.5, 5, 7.5, 10 and 12.5 mol% were synthesized by melt quench method at 1100 °C. The X ray diffractogram (XRD) of glass samples reveals their amorphous nature. Density of synthesized samples was found to increase when CaF2 composition varied from 2.5 to 12.5 mol%. UV visible absorption spectra of the samples show broad absorption band at nearly about 215 nm. The optical band gaps were estimated from the optical absorption spectra by using Tauc plots. An increase of band gap energies was observed due to the creation of ionic cross-links within the glass structure. The various other parameters like calcium ion concentration, polaron radius, internuclear distance and optical basicity values were calculated using the refractive index and density of glasses. For in vitro studies, the glasses were soaked in Simulated Body Fluid (SBF) solution for 14 days. The XRD and Infrared (IR) studies carried out on samples post immersion in SBF solution for 14 days have revealed the formation of hydroxyapatite layer.
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