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Interdiffusion in the System CaF 2 ‐SrF 2
Author(s) -
SCHEIDECKER RALPH,
BERARD M. F.
Publication year - 1973
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.1151-2916.1973.tb12457.x
Subject(s) - extrapolation , analytical chemistry (journal) , impurity , diffusion , activation energy , chemistry , tracer , solid solution , chemical composition , thermodynamics , materials science , mineralogy , physics , mathematical analysis , mathematics , organic chemistry , chromatography , nuclear physics
Interdiffusion coefficients were determined in single‐crystal (Ca,Sr)F 2 solid solutions in the temperature range 1100° to 1320°C. The composition dependence of the coefficients passes through a maximum that shifts toward higher CaF 2 concentrations at higher temperatures. Extrapolation of the interdiffusion coefficient to extremes of composition provides impurity diffusion coefficients that agree well with tracer results. The changes in activation energy with composition can be explained readily on the basis of cationic radii and lattice parameters.