npsm 새물리 New Physics : Sae Mulli

pISSN 0374-4914 eISSN 2289-0041
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Research Paper

New Phys.: Sae Mulli 2017; 67: 1405-1411

Published online December 29, 2017 https://doi.org/10.3938/NPSM.67.1405

Copyright © New Physics: Sae Mulli.

Ion Conduction and Dielectric Behavior of 2(BaO-TiO$_2$)-SiO$_2$ and BaO-SrO-2TiO$_2$-SiO$_2$ Glasses

Young-Hoon RIM*1, Mac KIM2, Yong Suk YANG†2

1 College of Liberal Arts, Semyung University, Chechon 27136, Korea
2 Department of Nano Fusion Technology, Pusan National University, Busan 46241, Korea 

Correspondence to:*yrim@semyung.ac.kr, †ysyang@pusan.ac.kr

Received: October 12, 2017; Revised: October 23, 2017; Accepted: October 31, 2017

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We have investigated the ionic conductivity and dielectric relaxation in perovskite-related 2(BaO-TiO$_2$)-SiO$_2$ (BTS) and BaO-SrO-2TiO$_2$-SiO$_2$ (BSTS) glasses. The sample was synthesized by using the melt quenching method. The impedance measurements were carried out in the frequency range from 100 Hz to 30 MHz and in the temperature range from 300 to 540 $^\circ$C at a heating rate of 5 $^\circ$C/min. The ionic conductivity can be characterized by applying the complex dielectric permittivity and the universal power-law driven by the modified fractional Rayleigh equation. The measured $dc$ and $ac$ activation energies of the BTS and the BSTS glasses were approximately in the range of 0.7~1.0 eV. The average value of the power-law exponent $s$ was almost constant for the BTS glass with increasing temperature, but it decreased for the BSTS glass with increasing temperature. Although the density of particles in the ion conduction of the BTS glass was higher than that in the ionic conduction of the BSTS glass, the ionic conductivities of both the BTS and the BSTS glasses were almost the same due to the potential barriers in the BTS glass being higher. 

Keywords: Glass, Conductivity, Dielectric relaxation, Activation energy, Cole-Cole plot, Power law

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