Study of AC electrical properties of V2O5-P2O5-B2O3-Dy2O3 glasses

被引：22
作者：
Barde, R. V. [1 ]
Waghuley, S. A. [2 ]
机构：
[1] HVPM Coll Engn & Technol, Dept Engn Phys, Amravati 444605, India
[2] St Gadge Baba Amravati Univ, Dept Phys, Amravati 444602, India
来源：
CERAMICS INTERNATIONAL | 2013年 / 39卷 / 06期
关键词：
Complex impedance; Electrical conductance; Glasses; DIELECTRIC-PROPERTIES; SILICATE-GLASSES; ION-TRANSPORT; CONDUCTIVITY; RELAXATION; BORATE; SYSTEM;
D O I：
10.1016/j.ceramint.2013.01.054
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：
The AC conductivity of glass samples of composition 60V(2)O(5)-5P(2)O5-(35-x)B2O3-xDy(2)O(3), 0.4 <= x <= 1.2 has been analyzed. The samples were prepared by the usual melt-quench technique. The prepared compounds were analyzed by X-ray diffraction (XRD) and thermo gravimetric differential thermal analysis (TG/DTA). The activation energies were evaluated using glass transition temperature (T-g) and peak temperature of crystallization (T-c) from TG/DTA. The dependence of activation energy on composition was discussed. The electrical conductance and capacitance were measured over a frequency range of 20 Hz to 1 MHz and a temperature range of 303-473 K; these reveal semiconducting features based predominantly on an ionic mechanism. The dielectric and complex-impedance response of the sample is discussed. The relaxation time was found to increase with increasing temperature. Jonscher's universal power law is applied to discuss the conductivity. The electrode polarization was found to be negligible and confirmed from electrical modulus. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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收藏
页码：6303 / 6311
页数：9
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