Kinetic & Energetic Aspects Of Diffusion Transport Of Water In Glassy And Crystalline Si02 & Al203 At High & Middle Temperatures

The problem of gas content and gas dynamics in glass are two sides of one general topic: the influence of gas incorporation on glass properties. Unfortunately, dynamics of gas transport in glasses is not well documented. It goes without saying that water diffusion behaviour in glasses is of the most interest because usually water is quantitatively the main impurity in glasses. The comparative study of diffusion characteristics of glassy and crystalline materials has established the role of structural factors in the mechanism of diffusion of water in Si02 and Al203. Diffusion coefficients of water in silica glass KU-1 (type III) produced by hydrolyzation of SiCl4 in an oxygen-hydrogen flame, quartz of natural and artificial origin, and corundum were determined for a wider temperature range (up to 1600 deg C).