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Induction Period for Oxygen Permeation through Calcia‐Stabilized Zirconia Ceramic
Author(s) -
Dou Shixue,
Masson Charles R.,
Pacey Philip D.
Publication year - 1989
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.1151-2916.1989.tb09692.x
Subject(s) - permeation , cubic zirconia , oxygen , diffusion , ceramic , impurity , partial pressure , materials science , induction period , inorganic chemistry , chemistry , chemical engineering , analytical chemistry (journal) , metallurgy , thermodynamics , organic chemistry , catalysis , engineering , biochemistry , physics , membrane
Chemical diffusion of oxygen in calcia‐stabilized zirconia, with impurities of A1 2 O 3 , SiO 2 , MgO, Fe 2 O 3 , and TiO 2 , was studied by the non‐steady‐state permeation technique at 960° to 1450°C. The apparent chemical diffusion coefficient, D , was found to decrease with increasing content of Fe 2 O 3 , and with decreasing oxygen pressure. The results were consistent with a trapping mechanism involving free and trapped electron holes or with partial control by surface processes.