1985/01/01 by A. Kolitsch, Kolitsch, Andreas, Richter, Edgar
Chemistry · Environmental Science · Materials Science · #660 #Advanced ceramic materials synthesis #Chemical Synthesis and Characterization #Inorganic Fluorides and Related Compounds
paper · doi:10.34657/14404
openalex publication_date 1985/01/01 · openalex created_date 2016/07/22 · openalex updated_date 2026/07/01
Ion exchange below the transformation range was investigated in sodium nitrate melts using alkali aluminosilicate, borosilicate and calcium silicate glasses. The Na-K ion exchange produced whitish opalescent surface layers permeated by cracks and flaws and their thickness was used as an indicator of the depth of penetration of the sodium ions from the melt into the glass. It can be shown that the molten salt penetrated into the surface defects to some extent. The measured exchange profiles are thus deeper than the sodium seif diffusion profiles. Α determination of the interdiffusion data (effective diffusivity, thermodynamic factor, etc.) was not possible from these experimental results.