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Diffusion of 51 Cr in MgO Crystals
Author(s) -
WEBER G. W.,
BITLER W. R.,
STUBICAN V. S.
Publication year - 1977
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.1151-2916.1977.tb16095.x
Subject(s) - diffusion , impurity , activation energy , analytical chemistry (journal) , materials science , isotope , crystal (programming language) , fusion , single crystal , chemistry , mineralogy , crystallography , thermodynamics , linguistics , physics , philosophy , organic chemistry , chromatography , computer science , programming language , quantum mechanics
An arc fusion technique was used to grow single crystals of MgO with an aliovalent impurity level of ∼ 250 ppm. Diffusion coefficients for Cr 3+ in single‐crystal MgO were measured from 1353° to 1553°C using a high‐specific‐activity isotope, 51 Cr. The diffusion coefficient of 51 Cr for both arc‐grown and vapor‐deposited MgO crystals can be characterized by an activation energy of 70.0±2.1 kcal/mol. These results are comparable with the interdiffusion coefficients in Cr 2 O 3 ‐MgO when the interdif‐fusion D is extrapolated to low Cr concentrations.