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Effect of Surface Condition on Oxygen Self‐Diffusion Coefficients for Single‐Crystal Al 2 O 3
Author(s) -
Oishi Yasumichi,
Ando Ken,
Suga Nobuhiko,
Kingery W. David
Publication year - 1983
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.1151-2916.1983.tb10106.x
Subject(s) - diffusion , analytical chemistry (journal) , single crystal , oxygen , self diffusion , diamond , oxygen 18 , chemistry , materials science , volume (thermodynamics) , isotopes of oxygen , effective diffusion coefficient , mineralogy , thermodynamics , crystallography , nuclear chemistry , metallurgy , chromatography , medicine , physics , self service , organic chemistry , radiology , marketing , magnetic resonance imaging , business
Oxygen self‐diffusion coefficients were determined for two Al 2 O 3 single crystals by the isotope‐exchange technique, using chemically polished and Ar ‐ion‐milled samples. Results represented by D=562 exp[–665(kJ/mol)/RT] cm 2 /s are lower than those for diamond‐paste‐finished samples and near Reed and Wuensch's results. The oxygen diffusion coefficient determined using crushed particles and the microscopically measured ratio of surface area to volume agreed with these values