1996
DOI: 10.1016/0022-3093(95)00462-9
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Chemical structure and the mixed mobile ion effect in silver-for-sodium ion exchange in silicate glasses

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1996
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Cited by 48 publications
(12 citation statements)
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“…During the ionexchange process the glass network undergoes concentrationdependent structural changes, due to the local coordination rearrangements at the ion sites [12,16,17]. The diffusion coefficients therefore come to depend on the local concentration [18], giving rise to correlation effects between ionic fluxes similar to a mixed-alkali effect, where the transport parameters of the ion species may dramatically depend on the concentration [19,20]. The Au electro-assisted migration presented in this work cannot be described by the phenomenological approaches developed for describing other ion-exchange processes [8,21].…”
Section: Resultsmentioning
confidence: 99%
“…During the ionexchange process the glass network undergoes concentrationdependent structural changes, due to the local coordination rearrangements at the ion sites [12,16,17]. The diffusion coefficients therefore come to depend on the local concentration [18], giving rise to correlation effects between ionic fluxes similar to a mixed-alkali effect, where the transport parameters of the ion species may dramatically depend on the concentration [19,20]. The Au electro-assisted migration presented in this work cannot be described by the phenomenological approaches developed for describing other ion-exchange processes [8,21].…”
Section: Resultsmentioning
confidence: 99%
“…This reaction takes place during the contact of the silver ions with the glass surface. Different explanations exist about the silver coloration mechanism [9][10][11][12][13]. Araujo [9] explains this process as being one of silver reduction where an electron is extracted from a non-bridging oxygen atom (NBO) of the glass structure by means of the addition of alkaline ions.…”
Section: Introductionmentioning
confidence: 98%
“…Several authors [9][10][11][12] have demonstrated that the silver colloidal formation takes place as a result of an ionic exchange process, where silver ions are introduced into the glass structure at a temperature close to the glass-transition one. This reaction takes place during the contact of the silver ions with the glass surface.…”
Section: Introductionmentioning
confidence: 99%
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“…On the other hand, when the ion exchange was carried out above T G [29] or when Na þ ions were exchanged by Ag þ ions [22,[30][31][32], diffusion and electrical conductivity data point to a Ômobility crossoverÕ of the dissimilar cations. However, in the case of Ag þ -for-Na þ ion-exchanged glasses, the composition dependence of the ionic mobilities seems to be less pronounced than in melt-grown glasses of the same composition.…”
Section: Introductionmentioning
confidence: 99%