Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar 522 510, AP, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2011 Sep;79(5):1116-22. doi: 10.1016/j.saa.2011.04.030. Epub 2011 May 11.
Optical and physical properties of Ni2+ doped 20ZnO+xLi2O+(30-x)Na2O+50B2O3 (5≤x≤25) glasses are carried out at room temperature. Powder XRD pattern of all the glass samples confirms the amorphous nature. Several physical parameters are evaluated for all the glasses with respect to the composition. The optical absorption spectra confirm the site symmetry of the Ni2+ doped glasses are near octahedral. Crystal field and inter-electronic repulsion parameters are also evaluated. It is interesting to observe that the optical band gap and Urbach energies exhibit the mixed alkali effect. The FT-IR spectral investigations of Ni2+ doped glasses exhibit characteristic vibrations of BO3 and BO4 units.
室温下进行了 Ni2+掺杂 20ZnO+xLi2O+(30-x)Na2O+50B2O3（5≤x≤25）玻璃的光学和物理性质研究。所有玻璃样品的粉末 XRD 图谱均证实其为非晶态。根据组成，评估了所有玻璃的多个物理参数。光学吸收光谱证实 Ni2+掺杂玻璃的位点对称性为近八面体。还评估了晶体场和电子间斥力参数。有趣的是，观察到光学带隙和 Urbach 能量表现出混合碱效应。Ni2+掺杂玻璃的 FT-IR 光谱研究显示出 BO3 和 BO4 单元的特征振动。
