Department of Physics, Osmania University, Hyderabad 500 007, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2012 Apr;89:39-45. doi: 10.1016/j.saa.2011.12.047. Epub 2011 Dec 29.
X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), energy dispersive X-ray spectrometry (EDS), differential scanning calorimetry (DSC), infrared (IR), Raman, electron paramagnetic resonance (EPR) and optical absorption studies on 10Li2O-xP2O5-(89-x)TeO2-1CuO glasses (where x=5, 10, 15, 20 and 25 mol%) have been carried out. The amorphous nature of the glasses was confirmed using XRD and FESEM measurements. The glass transition temperature (Tg) of glass samples have been estimated from DSC traces and found that the Tg increases with increasing P2O5 content. Both the IR and Raman studies have been showed that the present glass system consists of [TeO3], [TeO4], [PO3] and [PO4] units. The spin-Hamiltonian parameters such as g∥, g⊥, and A∥ have been determined from EPR spectra and it was found that the Cu2+ ion is present in tetragonal distorted octahedral site with [Formula: see text] as the ground state. Bonding parameters and bonding symmetry of Cu2+ ions have been calculated by correlating EPR and optical data and were found to be composition dependent.
对 10Li2O-xP2O5-(89-x)TeO2-1CuO 玻璃（其中 x=5、10、15、20 和 25mol%）进行了 X 射线衍射（XRD）、场发射扫描电子显微镜（FESEM）、能量色散 X 射线光谱（EDS）、差示扫描量热法（DSC）、红外（IR）、拉曼、电子顺磁共振（EPR）和光学吸收研究。XRD 和 FESEM 测量证实了玻璃的非晶态性质。通过 DSC 轨迹估算了玻璃样品的玻璃转变温度（Tg），发现 Tg 随 P2O5 含量的增加而增加。IR 和 Raman 研究均表明，本玻璃体系由 [TeO3]、[TeO4]、[PO3] 和 [PO4] 单元组成。通过 EPR 光谱确定了自旋哈密顿参数，如 g∥、g⊥ 和 A∥，并发现 Cu2+ 离子存在于四方畸变八面体配位中，[Formula: see text] 为基态。通过关联 EPR 和光学数据计算了 Cu2+ 离子的键合参数和键合对称性，发现它们是与组成相关的。
