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

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

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

343-354Synthesis 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

Physical, structural, optical and thermoluminescence behavior of Dy2O3 doped sodium magnesium borosilicate glasses

The rare earth doped borosilicate glass materials of composition (60 − x) B2O3 − 20 SiO2 − 10 Na2O − 10 MgO − x Dy2O3 have been prepared by melt quenching method. X-ray diffraction confirms the amorphous nature of the present glasses. FTIR spectra reveal the structure of the present glasses. The density, molar volume, average molecular weight, ion concentration, polaron radius and field strength have been determined. The optical parameters like optical band gap, refractive index, dielectric constant, optical dielectric constant, molar polarizability, reflection loss, molar refractivity, metallization and Urbach energy were also calculated. The glow curve behavior of all the present glass samples irradiated with 50 Gy, 100 Gy, 500 Gy, 1 kGy, 5 kGy and 10 kGy gamma ray doses has been investigated in temperature range 50–400°C. The TL dose response shows that the sample having 0.6 mol% doping of Dy3+ was best suitable for dosimetric applications. Keywords: Borosilicate glass, XRD, FTIR, UV–visible, Thermoluminescenc