Helium Permeation, Diffusion And Solubility In Sodium Galliosilicate Glasses

Helium permeability, diffusivity and solubility have been determined for four series of sodium galliosilicate glasses. The results are compared to literature data for sodium aluminosilicate and lithium galliosilicate glasses. Replacement of silica by gallium oxide decreases the helium permeability of glasses containing constant concentrations of soda but replacement of soda by gallium oxide increases the helium permeability of glasses containing a constant concentration of silica.