Journal ArticleDOI
Influence of water on the viscosity and thermal expansion of sodium trisilicate glasses
J.E. Shelby,G.L. McVay +1 more
TLDR
In this paper, the transformation range viscosity, activation energy for viscous flow and the dilatometric critical temperature of sodium trisilicate glasses are all decreased by addition of water, whereas the thermal expansion coefficient in the elastic region is not altered to a significant extent.Abstract:
The transformation range viscosity, activation energy for viscous flow and the dilatometric critical temperature of sodium trisilicate glasses are all decreased by addition of water, whereas the thermal expansion coefficient in the elastic region is not altered to a significant extent. Although these effects are similar to those observed in vitreous silica, they are considerably reduced in magnitude. Since sodium trisilicate glasses are already highly depolymerized by the presence of Na 2 O, the additional depolymerization due to small additions of water does not seem adequate to explain these results. It is suggested that water behaves similarly to the alkali oxides and that the results of this study may be due to an extreme case of the mixed-alkali effect.read more
Citations
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Journal ArticleDOI
Water and the viscosity of andesite melts
TL;DR: In this article, the authors measured the viscosity of a synthetic andesite-like melt with water contents in the range 0-3.5 wt% using configurational entropy theory.
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Hydroxyl sites in SiO2 glass: a note on infrared and Raman spectra
TL;DR: In this paper, the authors obtained infrared and Raman spectra for Si02-H20 glasses with low (1200 ppm) and high (6.3 wt%) water contents.
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Glass viscosity calculation based on a global statistical modelling approach
TL;DR: In this paper, a global model for predicting the complete viscosity curve of glass was developed using a global statistical approach and more than 2200 composition-viscosity data for silicate glasses collected from over 50 years of scientific literature, including soda-lime-silica container and float glasses, TV panel glasses, borosilicate fibre wool and E type glasses, low expansion borosile glass, glasses for nuclear waste vitrification, lead crystal glasses, binary alkali silicates, and various other compositions.
Journal ArticleDOI
Silica Segregation in the Ni ∕ YSZ Electrode
TL;DR: In this paper, solid oxide fuel cells were tested as solid oxide electrolysis cells used for high-temperature steam electrolysis and it was shown that it is the Ni/yttria-stabilized zirconia YSZ electrode that passivates.
Journal ArticleDOI
Interpretation of Hydrated States of Sodium Silicate Glasses by Infrared and Raman Analysis
TL;DR: In this article, the wave numbers of the combination-overtone bands of water molecules and SiOH groups in hydrated glasses were calculated satisfactorily with observed wave numbers in the near-infrared region.
References
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Journal ArticleDOI
Experimental Evaluation of Beam-Bending Method of Determining Glass Viscosities in the Range 108 to 1015 Poises
TL;DR: In this paper, the beam-bending method was used to determine the viscosity of a glass by the viscous bending of a simple beam, compared with the fiber-elongation technique.
Journal ArticleDOI
Mechanical Relaxations in Mixed‐Alkali Silicate Glasses: I, Results
James E. Shelby,Delbert E. Day +1 more
TL;DR: In this paper, the internal friction of silicate glasses containing mixtures of Li-Na, Li-K, Li Rb, Li C, Li N, K-Rb, Na Rb and Na C was measured from -180° to 500°C at a frequency of 0.4 Hz.
Journal ArticleDOI
The mixed alkali effect in the Na2OCs2OSiO2 glasses
TL;DR: In this article, the self-diffusion coefficients of sodium and cesium ions in Na 2 OCs 2 O SiO 2 glasses were measured at temperatures 350-550°C.
Journal ArticleDOI
Viscosity and Thermal Expansion of Alkali Germanate Glasses
TL;DR: In this article, a modification of this model is suggested to explain the data and the thermal expansion coefficients of the Na2O-GeO2 glasses also exhibit a minimum at < 5 mol% Na 2 O 2.
Journal ArticleDOI
Thermal expansion of mixed−alkali germanate glasses
TL;DR: In this article, thermal expansion measurements were made for several series of Na2O⋅K2O ⋅GeO2 glasses, for one series of N 2 O⋆Rb 2 O ⋆G 2 O 2 glasses, and for a series of C 2 C 2 O ¼ C 2 o ⋈ G 2 O glasses, with the deviations increasing with total alkali concentration.
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