• S R Elliott

      Articles written in Journal of Chemical Sciences

    • Distribution of ionic charge carriers and migration barriers in binary alkali silicate glasses

      K J Rao S R Elliott

      More Details Abstract Fulltext PDF

      Likely spatial distributions of network-modifying (and mobile) cations in (oxide) glasses are discussed here. At very low modifier concentrations, the ions form dipoles with non-bridging oxygen centres while, at higher levels of modification, the cations tend to order as a result of Coulombic interactions. Activation energies for cation migration are calculated, assuming that the ions occupy (face-sharing) octahedral sites. It is found that conductivity activation energy decreases markedly with increasing modifier content, in agreement with experiment.

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