Document Type

Article

Publication Date

4-8-2009

Journal or Book Title

Physical review Letters

Volume

102

Issue

14

First Page

145902

DOI

10.1103/PhysRevLett.102.145902

Abstract

Mixing two types of glass formers in ion conducting glasses can be exploited to lower conductivity activation energy and thereby increasing the ionic conductivity, a phenomenon known as the mixed glass former effect (MGFE). We develop a model for this MGFE, where activation barriers for individual ion jumps get lowered in inhomogeneous environments containing both types of network forming units. Fits of the model to experimental data allow one to estimate the strength of the barrier reduction, and they indicate a spatial clustering of the two types of network formers. The model predicts a time-temperature superposition of conductivity spectra onto a common master curve independent of the mixing ratio.

Comments

This article is from Physical Review Letters 102 (2009): 145902. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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