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Self‐diffusion of strontium ions in hydrous zirconia and stannic oxide
Author(s) -
Misak Nasr Z.,
Ghoneimy Hussein F.,
Mikhail Etidal M.,
Shabana ElSaid I.
Publication year - 1993
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280570102
Subject(s) - microporous material , oxide , diffusion , strontium , cubic zirconia , ion , texture (cosmology) , inorganic chemistry , materials science , porosity , alkaline earth metal , mineralogy , chemistry , metallurgy , composite material , ceramic , thermodynamics , metal , organic chemistry , physics , image (mathematics) , artificial intelligence , computer science
Self‐diffusion coefficients (D̄) of strontium ions in hydrous zirconia and stannic oxide heated at different temperatures have been determined at different apparent capacities. The study throws some light on the effects of capacity, acidity and porous texture on D̄. Except in the totally microporous stannic oxide heated at 50–200°C, D̄ in both oxides decreases continuously with capacity. For the former sample, the size of the diffusing entity seems to be relatively more important, and D̄ remains almost the same over a wide capacity range.