Structural, optical and dielectric characterization of niobium lithium tetraborate glasses doped praseodymium

被引：15

作者：

Abdel-Khalek, E. K. ^{[1
]}

Mohamed, E. A. ^{[2
]}

Ratep, A. ^{[3
]}

Salem, Shaaban M. ^{[1
]}

Kashif, I. ^{[1
]}

机构：

[1] Al Azhar Univ, Fac Sci, Dept Phys, Cairo 11884, Egypt

[2] Al Azhar Univ, Fac Sci, Dept Phys, Girls Branch, Cairo 11884, Egypt

[3] Ain Shams Univ, Dept Phys, Fac Girls, Cairo, Egypt

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2016年 / 441卷

关键词：

Glasses; Judd-Ofelt theory; AC conductivity; Optical and dielectric properties; ALKALI BORATE GLASSES; EMISSION PROPERTIES; TELLURITE GLASSES; NETWORK STRUCTURE; AC CONDUCTIVITY; ER3+ IONS; ABSORPTION; SPECTRA; SYSTEM; PR3+;

D O I：

10.1016/j.jnoncrysol.2016.03.015

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Glasses with compositions (100-x) Li2B4O7-xNb2O5 doped 1 mol% Pr6O11 (where x = 15, 25 and 35 mol%) were prepared. The glass nature of the present samples was established by X-ray diffraction (XRD) which is confirmed by differential thermal analysis (DTA) study. The infrared absorption spectra indicate that the structural units of the present samples are made up of BO3, BO4, NbO4 and NbO6. From the intensities of some optical absorption bands, Judd-Ofelt parameters Omega(lambda)(lambda = 2, 4, 6) have been evaluated. The variations in some physical properties such as the density (rho), molar volume (V-M), optical band gap (E-g) and Urbach energy (E-0) have correlated with structural changes in the glass samples. Measurements of the dielectric constant, dielectric loss and ac conductivity as a function of frequency (120 Hz - 100 kHz) and temperature (310-670 K) have also reported. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：58 / 65

页数：8

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