Effect of Gamma Irradiation on Structural and Optical Properties of Zirconium Incorporated Sodium Borate Glasses

• Published in: Transactions of the Indian Ceramic Society Vol. 79; no. 2; pp. 67 - 76
• Main Authors: Roopa, Eraiah, Bheemaiah
• Format: Journal Article
• Language: English
• Published: Benares Taylor & Francis 02.04.2020; Taylor & Francis Ltd
• Subjects: Absorption spectra; Atomic properties; Blue emission; Color matching; Crystal defects; Doppler effect; Emission spectra; Energy bands; Energy gap; Food irradiation; Gamma irradiation; Gamma rays; Glass; Infrared spectroscopy; Materials substitution; Non-bridging oxygens; Optical properties; Oxygen atoms; Physical properties; Radiation dosage; Red energy shift; Red shift; Sodium borates; Zirconium; Zirconium dioxide; Zirconium oxide
• ISSN: 0371-750X; 2165-5456
• DOI: 10.1080/0371750X.2020.1715839

The effects of gamma irradiation in the dose rate of 25 kGy on the structural and optical properties of ZrO 2 doped sodium borate glasses were studied. Glassy nature confirmed by XRD and all the physical parameters were calculated. IR spectra revealed the characteristic vibrational and stretching bands due to trigonal and tetrahedral borate network. Slight changes were caused by gamma irradiation in the intensities of the characteristic infrared borate bands and zirconium bands. Irradiated samples developed a noticeable absorption band similar to the F-band familiar in alkali halide crystals which clearly indicated that successive irradiation produced defects in the glass material. Substitution of ZrO 2 to the glass matrix suppressed the formation of visible absorption band formed by irradiation whereas no extra peak was observed in the spectral regions. A nonlinear trend was ascribed in the energy band gap values due to the creation of more number of non-bridging oxygen atoms. Emission spectra showed five emission bands corresponding to the zirconium ions which decreased to a very low intensity with a red shift after irradiation. Matching the colour co-ordinates bright blue emission was found for 5 mol% ZrO 2 in both irradiated and non irradiated sample.