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Oxygen Self‐Diffusion in MgO Single Crystals
Author(s) -
Oishi Yasumichim,
Ando Ken,
Kurokawa Hiroshi,
Hirsco Yoji
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.tb15695.x
Subject(s) - diffusion , oxygen , impurity , self diffusion , materials science , isotopes of oxygen , analytical chemistry (journal) , kinetic isotope effect , chemistry , thermodynamics , nuclear chemistry , atomic physics , deuterium , physics , self service , organic chemistry , chromatography , marketing , business
Oxygen self‐difusion coefficients in two MgQ single crystals were determined by un isotope exchange technique at 1300° to 1750°C using chemically polished samples. There is a sharp breuk in the temperature dependence at 1500°C. The high‐temperature regime is represented by D = 6.76 exp [‐536 (kj/mol)/RT] cm 2 /s, indicating an impurity‐insensitive diffusion mechanism. Extrinsic diffusion in the low‐temperature regime was interpreted to be structure‐sensitive.