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Sodium Diffusion in Glass: II, Mixed Na‐K Silicate Glasses
Author(s) -
LIM CHUNG,
DAY DELBERT E.
Publication year - 1977
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1977.tb14085.x
Subject(s) - diffusion , ion , vacancy defect , sodium , silicate glass , atom (system on chip) , sodium silicate , materials science , analytical chemistry (journal) , silicate , isotopes of sodium , chemistry , mineralogy , crystallography , thermodynamics , metallurgy , chromatography , physics , organic chemistry , computer science , embedded system
The isotope effect for 22 Na/ 24 Na diffusion was used to investigate the sodium ion transport mechanism in mixed Na‐K silicate glasses. A combined vacancy‐interstitialcy mechanism provided the best agreement with the experimental 22 Na/ 24 Na isotope effect data. At low temperatures sodium diffusion occurs predominantly by 2‐atom interstitialcy jumps, but with increasing temperature an increasing fraction of the ions diffuse by a single‐atom vacancy mechanism.