ABSTRACT The effects of gamma irradiation in the dose rate of 25 kGy on the structural and optical properties of ZrO2 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 ZrO2 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% ZrO2 in both irradiated and non irradiated sample. GRAPHICAL ABSTRACT

中文翻译：

---

γ辐照对掺锆硼酸钠玻璃结构和光学性能的影响

摘要 研究了剂量率为 25 kGy 的伽马辐射对 ZrO2 掺杂硼酸钠玻璃结构和光学性能的影响。通过XRD确认玻璃性质并计算所有物理参数。由于三角和四面体硼酸盐网络，红外光谱揭示了特征振动带和伸缩带。伽马辐射引起特征红外硼酸盐带和锆带强度的轻微变化。辐照后的样品产生了明显的吸收带，类似于碱金属卤化物晶体中常见的 F 带，这清楚地表明连续辐照在玻璃材料中产生了缺陷。ZrO2 取代玻璃基质抑制了由辐射形成的可见吸收带的形成，而在光谱区域没有观察到额外的峰。由于更多数量的非桥接氧原子的产生，能带隙值出现非线性趋势。发射光谱显示与锆离子相对应的五个发射带在照射后降低到非常低的强度并发生红移。与颜色坐标相匹配，在辐照和未辐照样品中发现 5 mol% ZrO2 的亮蓝色发射。图形概要 发射光谱显示与锆离子相对应的五个发射带，其强度在辐照后降低至非常低的红移。与颜色坐标相匹配，在辐照和未辐照样品中发现 5 mol% ZrO2 的亮蓝色发射。图形概要 发射光谱显示与锆离子相对应的五个发射带，其强度在辐照后降低至非常低的红移。与颜色坐标相匹配，在辐照和未辐照样品中发现 5 mol% ZrO2 的亮蓝色发射。图形概要