Synthesis and the study of structural, thermal and optical properties of (100-x)Bi2O3-x(BaO-TiO2) glass system

Bismuthbarium titanate glasses have been synthesized by conventional melt quenching technique. X-Ray Diffractograms confirmed the glassy nature of the prepared samples. Various parameters such as density, molar volume, Oxygen packing density (OPD), molar refractivity, molar polarizability, metallization criterion, refractive index and reflection loss have been calculated for understanding the physical and optical characteristics of prepared glasses. A perusal of Differential thermal analysis (DTA) and oxygen packing density (OPD) values confirmed that there is an increase in glass transition temperature (T-g) with increasing BT (BaO-TiO2) content. The analysis of Fourier-transform Infra-Red (FTIR) and Raman spectra clearly confirmed that the glass network mainly comprises of [TiO4], [TiO5] and [TiO6] units which play a significant role as the network formation, network intermediate and network modifier respectively. A non-linear variation of optical band gap energy with the increase in BT (BaO-TiO2) content has been recorded and the same has also been confirmed from the Urbach energy calculations and metallization criterion of the prepared glass samples. The electronegativity and electronic polarizability values revealed the ionic character of the glass samples.