Correlation of ion dynamics and structure in superionic glasses and nanocomposites

Dutta, D. ; Ghosh, A. (2009) Correlation of ion dynamics and structure in superionic glasses and nanocomposites Journal of Non-Crystalline Solids, 355 (37-42). pp. 1930-1934. ISSN 0022-3093

Full text not available from this repository.

Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.jnoncrysol.2009.04.051

Abstract

Ion dynamics of AgI-doped Ag2O–TeO2 glasses and Ag2S doped glass nanocomposites have been studied using impedance spectroscopy and correlated with their structures investigated using Fourier transform infrared spectroscopy. The composition dependences of the dc conductivity and the activation energy of these glasses and nanocomposites have been compared with those of AgI-doped silver phosphate and borate glasses. We have studied the ion dynamics in the framework of the power-law and the electric modulus formalisms. We have established a correlation between the crossover rate of the mobile silver ions and the rearrangement of the structural units of glassy networks. The scaling of the conductivity spectra has been used to interpret the temperature and composition dependence of the relaxation dynamics. Analysis of the dielectric relaxation in the framework of modulus formalism indicates an increase in ion–ion cooperation in the glass compositions with increasing AgI content.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Conductivity; Dielectric Properties; Relaxation; Electric Modulus; Infra-red Fibers; Glasses
ID Code:72816
Deposited On:29 Nov 2011 13:28
Last Modified:29 Nov 2011 13:28

Repository Staff Only: item control page