Sodium diffusion in boroaluminosilicate glasses

Smedskjær, Morten Mattrup; Zheng, Qiuju; Mauro, John C.; Potužák, Marcel; Mørup, Steen; Yue, Yuanzheng

doi:10.1016/j.jnoncrysol.2011.07.008

Cited by 51 publications

(51 citation statements)

References 40 publications

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“…The understanding that the bond dissociation energy and the polarizability can be correlated to the effective diffusion coefficient also provides a perspective how ionic diffusion and ion-exchange strengthening behave in different types of glasses, including, e.g., chalcogenide or chalcohalide glasses (Calvez et al, 2009). Furthermore, it provides the insight that the alkali ions bond less strongly when charge compensating Al 3+ , B 3+ , or P 5+ than when creating NBO, i.e., likely a significant difference in the type of bonding, in accordance with (Smedskjaer et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…Despite their disadvantages (Martin and Angell, 1986), these models provide a decent understanding that by changing the glass composition (e.g., through introduction of Al2O3, B2O3, and/or P2O5), the number of NBOs is varied. This is discussed by Grandjean et al (2007) and Smedskjaer et al (2011) where the latter suggests that the alkali ions diffuse faster when acting as charge compensators to, e.g., Al 3+ or B…”

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confidence: 99%

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Trends in Effective Diffusion Coefficients for Ion-Exchange Strengthening of Soda-Lime-Silicate Glasses

et al. 2017

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Monovalent cations enable efficient ion-exchange processes due to their high mobility in silicate glasses. Numerous properties can be modified in this way, e.g., mechanical, optical, electrical, or chemical performance. In particular, alkali cation exchange has received significant attention, primarily with respect to introducing compressive stress into the surface region of a glass, which increases mechanical durability. However, most of the present applications rely on specifically tailored matrix compositions in which the cation mobility is enhanced. This largely excludes the major area of soda-lime-silicates (SLS) such as are commodity in almost all large-scale applications of glasses. Basic understanding of the relations between structural parameters and the effective diffusion coefficients may help to improve ion-exchanged SLS glass products, on the one hand in terms of obtainable strength and on the other in terms of cost. In the present paper, we discuss the trends in the effective diffusion coefficients when exchanging Na + for various monovalent cations (K + , Cu + , Ag + , Rb + , and Cs + ) by drawing relations to physicochemical properties. Correlations of effective diffusion coefficients were found for the bond dissociation energy and the electronic cation polarizability, indicating that localization and rupture of bonds are of importance for the ion-exchange rate.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

Trends in Effective Diffusion Coefficients for Ion-Exchange Strengthening of Soda-Lime-Silicate Glasses

et al. 2017

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“…The analyzed compositions are reported in Table 1. The iron redox state in the iron-containing glasses was determined by 57 Fe Mössbauer spectroscopy with uncertainty of ±5% [30]. The densities were determined using Archimedes principle.…”

Section: Sample Preparationmentioning

confidence: 99%

“…Table 1 Chemical composition, homogenization temperature (T h ), iron redox ratio ([Fe 3+ ]/ [Fe] tot ), and fraction of tetrahedral to total boron (N 4 ) of the investigated iron-free and iron-containing glasses. Iron redox ratio was determined by 57 Fe Mössbauer spectroscopy with uncertainty of ± 5% [30]. N 4 was determined by 11 B MAS NMR spectroscopy with uncertainties of ± 0.2% [28].…”

Section: Mechanical Testingmentioning

confidence: 99%

Composition–structure–property relationships in boroaluminosilicate glasses

Zheng¹,

Potužák²,

Mauro³

et al. 2012

Journal of Non-Crystalline Solids

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104

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“…Alkali metal diffusion from the NAS glass to the TFTs can degrade the overall lifetime of the electronic devices. The alkali diffusivity increases exponentially with temperature and becomes a significant problem for ion-exchanged glass above 300° C [1]. In order to build TFTs on this NAS glass, it is required to reduce the processing temperature for the active channel material as well as the gate insulator material.…”

Section: Introductionmentioning

confidence: 99%