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Mixed Barrier Model for the Mixed Glass Former Effect in Ion Conducting Glasses
- Source :
- Physical Review Letters. 102
- Publication Year :
- 2009
- Publisher :
- American Physical Society (APS), 2009.
-
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.
- Subjects :
- Condensed Matter::Soft Condensed Matter
Superposition principle
Materials science
Conductivity activation energy
Chemical physics
Spatial clustering
Mixing ratio
General Physics and Astronomy
Conductivity spectra
Ionic conductivity
Condensed Matter::Disordered Systems and Neural Networks
Mixing (physics)
Ion
Subjects
Details
- ISSN :
- 10797114 and 00319007
- Volume :
- 102
- Database :
- OpenAIRE
- Journal :
- Physical Review Letters
- Accession number :
- edsair.doi.dedup.....4f2425fb5145df490ea9fb3692949ac3