IR reflection spectroscopy of a soda-lime glass surface during ion-exchange

Lee, YongKeun; Peng, Yih Lih; Tomozawa, M.

doi:10.1016/s0022-3093(97)90104-6

Cited by 20 publications

(13 citation statements)

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“…Infrared (IR) reflectance spectra from glasses have been well studied by several authors [3,5,7,8,10,14,18]. IR spectra of pure vitreous silica or quartz present only one band, located at 1100 cm À1 , due to the stretching vibration of the group Si-O-Si.…”

Section: Discussionmentioning

confidence: 99%

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Characterization of potash-glass corrosion in aqueous solution by ion beam and IR spectroscopy

Vilarigues¹,

Silva

2006

Journal of Non-Crystalline Solids

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Section: Discussionmentioning

confidence: 99%

“…The data obtained for the pH evolution were analyzed by expressing the amount of material escaped from the glass versus t 1/2 (with t the duration of the test) and comparing with linear (i.e., corresponding to Fick's diffusion equation) and non-linear functions [8][9][10][11][12].…”

Section: Corrosion Evaluationmentioning

confidence: 99%

Characterization of potash-glass corrosion in aqueous solution by ion beam and IR spectroscopy

Vilarigues¹,

Silva

2006

Journal of Non-Crystalline Solids

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“…Infrared reflection spectra of soda lime silicate glass ion-exchanged in molten KNO 3 for various times (redrawn from Ref. [49]). situation where the local stress fields of compression and tension in glass matrix are developed in concert with each other in an interacting manner when the pairs of unlike alkali cations are swapped around the neighboring sites.…”

Section: Dissimilar Ion Movement and Network-forming Matrix Responsementioning

confidence: 99%

Defect model for the mixed mobile ion effect

Belostotsky¹

2007

Journal of Non-Crystalline Solids

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This paper presents a new defect model for the mixed mobile ion effect. The essential physical concept involved is that simultaneous migration of two unlike mobile ions in mixed ionic glass is accompanied by expansion or contraction of the guest-occupied sites with distortion of surrounding glass matrix; in many cases, an intensity of the local stresses in glass matrix surrounding ionic sites occupied by foreign ions is much greater than, or at least comparable to the glass network binding energy. Hence, when the stress exceeds the breaking threshold, relaxation occurs almost immediately via the rupture of the bonds in the nearest glass matrix with generation of pairs of intrinsic structural defects. The specificity of the mechanism of defect generation leads to the clustering of negatively charged defects, so that rearranged sites act as high energy anion traps in glass matrix. This results in the immobilization of almost all minority mobile species and part of majority mobile species, so mixed mobile ion glass behaves as single mobile ion glass of much lower concentration of charge carriers. Generation of defects leads also to the depolymerization of glass network, which in turn results in the reduction of the glass viscosity and Tg as well as in the compaction of glass structure (thermometer effect). The magnitude of the mixed mobile ion effect is defined by the size mismatch of unlike mobile ions, their total and relative concentrations, the binding energy of the glass-forming network, and temperature. Although the proposed model is based upon the exploration of alkali silicate glass-forming system, the approach developed here can be easily adopted to other mixed ionic systems such as crystalline and even liquid ionic conductors.Comment: 33 pages, 2 figure

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“…To the far right of the spectrum at 975 cm À1 , there is the emergence over time of a significant peak that is noticeable at 20 days of hydration and afterward. This peak has been correlated with the SieO stretching mode of the NBOs (Lee et al, 1997) and its growth parallels the loss of modifiers in the glass surface. Because of the higher durability and slower leaching rate, the HA/LM glass did not show a significant change in the silica bands over the same period of exposure to water vapor.…”

Section: Analytical Resultsmentioning

confidence: 82%