Rao, KJ and Elliott, SR (1994) Distribution of ionic charge carriers and migration barriers in binary alkali silicate glasses. In: Proceedings of the indian academy of sciences - chemical sciences, 106 (4). pp. 903-911.
distribution.pdf - Published Version
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.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to Indian Academy of Sciences.|
|Keywords:||Alkali ions;silicate glasses;migration energy barriers; spatial distribution;activation energies;non-bridging;oxygen ions.|
|Department/Centre:||Division of Chemical Sciences > Solid State & Structural Chemistry Unit|
|Date Deposited:||02 Jun 2011 04:35|
|Last Modified:||02 Jun 2011 04:35|
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