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Oxygen Exchange and Diffusion in Calcia‐Stabilized Zirconia
Author(s) -
SIMPSON L. A.,
CARTER R. E.
Publication year - 1966
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.1151-2916.1966.tb15391.x
Subject(s) - oxygen , diffusion , cubic zirconia , effective diffusion coefficient , crystallite , materials science , electrical resistivity and conductivity , analytical chemistry (journal) , oxygen transport , conductivity , thermodynamics , chemistry , metallurgy , ceramic , electrical engineering , engineering , medicine , physics , organic chemistry , radiology , chromatography , magnetic resonance imaging
Oxygen diffusion was measured by the sectioning technique on single‐crystal and polycrystalline specimens of Zr 0.858 Ca 0.142 CO 1.858 . The diffusion coefficient, which may be represented by the equation D = 0.01818 +0.068 ‐0.015 exp ‐ (31, 200 × 4300)/ RT cm 2 /sec agrees with that calculated from the electrical conductivity and an oxygen transport number of 1. The oxygen surface exchange coefficient may be represented by α= 0.078 +0.443 ‐0.066 exp ‐ (22,800 × 4400/ RT cm/sec The quantitative influence of ignoring the exchange rate on the apparent diffusion coefficient is discussed.