Role of WO3 on DC conductivity and some optical properties of TeO2 based glasses

被引：35
作者：
Upender, G. [1 ,2 ]
Devi, Ch Sameera [3 ]
Mouli, V. Chandra [3 ]
机构：
[1] Univ Hyderabad, Sch Phys, Hyderabad 500046, Andhra Pradesh, India
[2] Cent Glass & Ceram Res Inst, Council Sci & Ind Res, Glass Technol Lab, Glass Div, Kolkata 700032, India
[3] Osmania Univ, Dept Phys, Hyderabad 500007, Andhra Pradesh, India
来源：
MATERIALS RESEARCH BULLETIN | 2012年 / 47卷 / 11期
关键词：
Glasses; Optical materials; Ionic conductivity; Optical properties; TUNGSTEN-TELLURITE GLASSES; AMORPHOUS SEMICONDUCTORS; ELECTRICAL-CONDUCTIVITY; SIMPLE OXIDES; ABSORPTION; POLARIZABILITY; SYSTEM; B2O3; EPR;
D O I：
10.1016/j.materresbull.2012.06.024
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
DC electrical conductivity and optical absorption studies have been employed to understand the influence of WO3 content on the electrical and optical properties of the TeO2-GeO2-WO3 glass system. Field emission scanning electron microscope (FESEM), Energy dispersive X-ray spectrometry (EDS) measurements have been used to confirm the glassy nature and the elemental analysis of the glass composition, respectively. DC electrical conductivity of the glasses was studied in the temperature range 423-613 K. From Arrhenius plot, the activation energies (E-act) of all the glasses have been calculated and conduction mechanism has been discussed in terms of structural changes occurred with the addition of WO3 content. The optical properties such as optical band gap (E-opt), Urbach energy (Delta E), molar refraction (R-M), metallization criterion (M), electronic polarizability of the oxide ion (alpha(o2-)) and refractive index (n) have been determined from optical absorption data and were found to be composition dependent. (c) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：3764 / 3769
页数：6
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