Ionic mobility in an ion exchanged silver—sodium boroaluminosilicate glass for micro-optics applications

This is the authors' abstract. We don't add key points for this paper.

Several samples of a sodium-containing boroaluminosilcate glass were ion exchanged to equilibrium from mixed silver and sodium nitrate salt liquids. The resulting glasses had homogeneous compositions, but each contained different relative amounts of Ag and Na. Silver and Na radioactive-tracer diffusion coefficients were then measured in these glasses as a function of host composition. The measured Na and Ag tracer coefficients vary by factors of only two and ten over the full composition range. The interdiffusion coefficient is measured by applying Boltzmann—Matano analysis to energy-dispersive X-ray spectroscopy composition profiles. We show that the mobility contribution to the interdiffusion coefficient can be approximated by using constant tracer diffusion coefficients. Further, the thermodynamic contribution is larger than in samples of furnace-melt, double-alkali glasses. These results cannot be attributed to the thermal history of these glasses.