Some issues of the theory of hydrogen permeability of glasses for the manufacture of microspheres are considered. The known data on the gas permeability of glasses, the connectivity of the structural grid, the oxygen number, and the free volume of the structure are analyzed. It is established that of the known expressions for the hydrogen permeability coefficient, only one can be used to predict the trend of change in this property, since it expresses the dependence of permeability on temperature and the content of components K Н =f(T −1 , C Gf ). An expression for the activation energy of hydrogen permeability is obtained, its values are estimated under different conditions. It is proved that there are no glasses impervious to hydrogen, and quartz and high–silica glasses are the most hydrogen-permeable.
Some issues of the theory of hydrogen permeability of glasses for the manufacture of microspheres are considered. The known data on the gas permeability of glasses, the connectivity of the structural grid, the oxygen number, and the free volume of the structure are analyzed. It is established that of the known expressions for the hydrogen permeability coefficient, only one can be used to predict the trend of change in this property, since it expresses the dependence of permeability on temperature and the content of components K Н =f(T −1 , C Gf ). An expression for the activation energy of hydrogen permeability is obtained, its values are estimated under different conditions. It is proved that there are no glasses impervious to hydrogen, and quartz and high–silica glasses are the most hydrogen-permeable.