Glass former units and transport in ion-conducting network glasses

Details Glass former units and transport in ion-conducting network glasses Glass former units and transport in ion-conducting network glasses

2010-09-10

arxiv.org/abs/1009.1964v1

Physics

Condensed Matter

Materials Science

4 pages, 4 figures

Scientific paper

A new theoretical approach is presented for relating structural information to transport properties in ion conducting network glasses. It relies on the consideration of the different types of glass forming units and the charges associated with them. Changes in the compositions of these units lead to a re-distribution of Coulomb traps for the mobile ions and to a subsequent change in long-range ionic mobilities. It is furthermore shown how measured changes of the unit compositions can be explained by thermodynamic modeling. The theories are tested against experiments on borophosphate glasses and yield good agreement with the measured data both for the compositional changes of the units and the variation of the activation energy.

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