THE INFLUENCE OF IRON OXIDE ON THE STRUCTURAL AND OPTICAL PROPERTIES OF BOROSILICATE GLASSESTHE INFLUENCE OF IRON OXIDE ON THE STRUCTURAL AND OPTICAL PROPERTIES OF BOROSILICATE GLASSES
Borosilicate glasses containing Fe2O3 with the chemical composition 30Na2O - 2Al2O3 - 25SiO2 - xFe2O3 - (43-x) B2O3 have been prepared and studied over a wide range of concentrations. The impact of such oxide on optical and physical properties of the present system has been examined. The further replacement of Fe2O3 instead of B2O3 generally increases the density and molar volume due to the change in the internal structure of the glass network. The optical variation was interpreted according to the observed incorporation of iron oxide and the possible mechanism of non-bridging oxygen in silicate and bridging bonds in borate network. The investigated samples in this study were confirmed to be amorphous by means of XRD, which proved that there are no natural crystal contents.