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

Abstract

Synthesis of lithium borate glass system was carried using the melt quenching technique with varying concentrations ofmagnesium followed by analysing the different characteristics such as physical, structural, optical and thermoluminesceneusing various techniques eg. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV-Visspectroscopy, and Thermoluminescence (TL). The obtained XRD pattern confirmed the amorphous nature of the preparedsamples. Relevant physical parameters have been evaluated to study the response of these properties with respect tomagnesium content. The density and molar volume values showed that the network structure changed with increasingmagnesium content. It is evident from the FTIR spectra that the network of the prepared samples predominantly containsBO3 and BO4 units. The UV-vis spectra confirmed a decrease in the direct and indirect band gap values with increase inMgO content. Optical parameters namely refractive index, electronic polarizability, reflection loss and dielectric constantwere also calculated and found to be in good correlation with other studies. Following gamma rays irradiation with differentdoses, TL glow curves of prepared glasses were analysed. Deconvolution of TL glow curves was done using glow curveconvolution deconvolution (GCCD) function and trapping parameters of isolated peaks viz. activation energy and frequencyfactor have been determined.