Diffusion across the glass transition in silicate melts: Systematic correlations, new experimental data for Sr and Ba in calcium-aluminosilicate glasses and general mechanisms of ionic transport
The systematic between viscosity and diffusivity is explored based on published data. Sr and Ba diffusion coefficients are measured in calcium aluminosilicate glasses. Generalized expressions predicting cations diffusion coefficients are provided. The nature of diffusion in glassy and molten states is analyzed.