| Water Diffusion in Glasses: Influence of
Pressure and Fugacity on Diffusion Coefficient
of Hydroxyl and Molecular Groups |
A. DAs GUPTA* AND A. DEY , C. T. MoYNIHAN AND M. ToMOZAWA
Pages : 8-13
DOI : 10.1080/0371750X.1994.10804621 |
| Abstract |
| Diffusion of water in silica glass was studied under high
pressure and water fugacities. To clarify the role of each
parameter, experiments were conducted by varying the pressure
at constant fugacity and by varying the fugacity at constant
pressure. Concentrations of diffusing substances were obtained
using FfiR spectroscopy. The solubility of molecular water species
was observed to decrease with pressure while it increased
linearly with fugacity. The diffusivities of hydroxyl and molecular
water species were obtained at different pressures and
fugacities. |
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