CrO2‐Cr2O3 Phase Boundary Under High O2 Pressures
- 1 May 1973
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 56 (5) , 248-249
- https://doi.org/10.1111/j.1151-2916.1973.tb12480.x
Abstract
The phase boundary between CrO2 and Cr2O3 was reinvestigated under high O2 pressures by using a new type of gas compressor. The boundary curve can be represented as log Po2= 7.16‐(3579/T). Using the observed data, ΔG°, ΔH°, and ΔS° for the reaction 2CrO2⇋Cr2O3+½O2 were calculated to be: ΔG°= ‐(1.55/100)T+7.60 kcal/mol, ΔH°= ‐8.19 kcal/mol, and ΔS°= (‐15.8/T)+0.0155 kcal/mol.Keywords
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