Alkali Diffusion and Electrical Conductivity in Sodium Borate Glasses

摘要: Abstract The diffusion coefficient of sodium, 22 Na, and silver, 110 Ag, electrical conductivity for sodium borate glasses (4–24 mol% Na 2 O) has been measured from 100°C to slightly below the glass transition temperature, T g . Unlike silicate where self-diffusion is much larger than impurity coefficient, D Ag had close same magnitude in glasses. In some glasses, was O-Ag O-B O 3 show a relatively small mixed alkali effect, despite significant mass difference between Ag(≈108) Na(≈23). It concluded that effect more dependent upon ionic radii rather differences mass.