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Sublimation of Cr 2 O 3 at High Temperatures
Author(s) -
WANG KECHIN,
DREGER LLOYD H.,
DADAPE V. V.,
MARGRAVE JOHN L.
Publication year - 1960
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.1151-2916.1960.tb13604.x
Subject(s) - sublimation (psychology) , vaporization , analytical chemistry (journal) , chemistry , oxide , mineralogy , materials science , metallurgy , psychology , organic chemistry , psychotherapist , chromatography
The sublimation of chromic oxide, Cr 2 O 3 , has been observed in vacuum by the Langmuir technique using induction and solar heating. Extensive sublimation did not yield any new phases on the basis of X‐ray powder studies, and condensates of Cr 2 O 3 were always obtained. Flash vaporization and flow experiments in CO or O 2 atmospheres and in vacuum indicated no appreciable differences in rates of sublimation. Weight‐loss experiments showed that the rate of sublimation was slightly higher than predicted for decomposition to the elements and suggested that small amounts of complex molecules, e.g. CrO and CrO 2 , were also present in the equilibrium vapor.