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| Format: | Artículo científico |
| Language: | en |
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Sociedade Brasileira de Física
2005
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| Online Access: | https://www.redalyc.org/articulo.oa?id=46435407 |
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Table of Contents:
- Test of Anderson-Stuart model and the "universal" conductivity in rubidium and cesium silicate glasses Eduardo do Nascimento Marcio Luis Ferreira Nascimento Shigueo Watanabe Física, Astronomía y Matemáticas An analysis and brief discussion of experimental ionic conductivity s and activation energy EA in the binaryrubidium and cesium silicate systems is presented, exemplified on 23 and 30 glasses respectively, in a widecomposition range (5-45 Rb2O and Cs2O mole%). The Anderson and Stuart model has been considered todescribe the variation of activation energy EA with alkali concentration in both alkali-silica systems. In thisanalysis were considered experimental parameters, like shear modulus G and relative dielectric permittivity e.An universal finding is obtained using logs£EA=kBT in 51 of 53 glasses considering both alkali systems,where EA is the activation energy for conduction, kB is the Boltzmann constant and T is the absolute temperature.This strong correlation by more than 13 (Rb-based glasses) and 15 (Cs-based glasses) orders of magnitude meansthat s is governed mainly by EA. An explanation for this behavior links ionic conductivity and microscopicstructure. 2005 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46435407 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.3A Vol.35