Premium
Cation Self‐Diffusion in Cr 2 O 3
Author(s) -
Hoshino Kazutomo,
Peterson N. L.
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.tb10572.x
Subject(s) - self diffusion , thermal diffusivity , diffusion , partial pressure , vacancy defect , atmospheric temperature range , oxygen , oxygen pressure , materials science , analytical chemistry (journal) , chemistry , thermodynamics , crystallography , physics , self service , organic chemistry , chromatography , marketing , business
Self‐diffusion of 51 Cr was measured both parallel to and perpendicular to the c axis in single crystals of Cr 2 O 3 as a function of oxygen partial pressure at 1490° and 1570°C. The oxygen‐partial‐pressure dependence of the diffusivity indicates that cation self‐diffusion occurs by a vacancy mechanism. The values of the self diffusion coefficients determined in this experiment are about 10 4 times smaller than those previously reported in this temperature range .