The Role of MgO Modifier on Physical, Structural, Optical and Thermoluminescence Properties of Lithium Borate Glass System

Abstract

Synthesis of lithium borate glass system was carried using the melt quenching technique with varying concentrations of magnesium followed by analysing the different characteristics such as physical, structural, optical and thermoluminescene using various techniques eg. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV-Vis spectroscopy, and Thermoluminescence (TL). The obtained XRD pattern confirmed the amorphous nature of the prepared samples. Relevant physical parameters have been evaluated to study the response of these properties with respect to magnesium content. The density and molar volume values showed that the network structure changed with increasing magnesium content. It is evident from the FTIR spectra that the network of the prepared samples predominantly contains BO₃ and BO₄ units. The UV-vis spectra confirmed a decrease in the direct and indirect band gap values with increase in MgO content. Optical parameters namely refractive index, electronic polarizability, reflection loss and dielectric constant were also calculated and found to be in good correlation with other studies. Following gamma rays irradiation with different doses, TL glow curves of prepared glasses were analysed. Deconvolution of TL glow curves was done using glow curve convolution deconvolution (GCCD) function and trapping parameters of isolated peaks viz. activation energy and frequency factor have been determined.