Mixed transition and rare earth ion doped borate glass: structural, optical and thermoluminescence study
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The present work report on physical, structural, optical and thermoluminescence properties of Dy3+ doped manganese potassium borate glasses. The conventional melt quenching technique is used to prepare the glass samples. The amorphous nature of the prepared glass sample is confirmed by X-ray diffraction study. The different B–O vibrational bands and change in the coordination number of boron (BO3 → BO4) with the inclusion of Dy3+ ions in the prepared glasses were analyzed through FTIR. The physical parameters such as density, molar volume, average molecular weight, ion concentration, polaron radius, internuclear distance and optical parameters have been determined. The optical analysis reveals that the optical band gap energy decreases with the increase of dysprosium oxide concentration. The TL glow curve of gamma irradiated samples showed single prominent peak in the temperature range 425–460 K with varying concentration of Dy2O3. Analysis of kinetic parameters reveals that the glasses demonstrate second order kinetics.
The authors are very grateful to Scientific Engineering & Research Board (SERB), Govt. of India for providing us funds (Vide number—SB/FTP/PS- 085/2014) to carry out this research work. The authors also would like to take this opportunity to thank the Inter University Accelerator Centre (IUAC), New Delhi, India for providing irradiation facilities. The authors are also thankful to Dr. Devinder Singh for his valuable inputs and suggestions.
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