Hydrogen diffusion in silicate glasses

摘要: Abstract The permeation of hydrogen into silver-doped glasses in the range 280–450°C is derived from spectrophotometric determinations rate precipitation colloidal silver. By measuring this as a function partial pressure effect mobility silver ions may be allowed for and values obtained alkali ion-silver ion interdiffusion coefficient. method tested by adding various amounts to same base glass comparing P H 2 D Ag + . When Na replaced Ca ++ simple silicate reduced spite decrease number network modifying ions. Substitution Mg leads an increase permeability while replacement Sr or Ba causes decrease.