Showing papers on "Chromium(III) oxide published in 1974"
42 citations
01 May 1974
TL;DR: In this paper, it was shown that the rate of oxidative vaporization of Cr2O3 was markedly enhanced in the presence of O atoms, and the enhancement was about 10 to the 9th power at 820 K in oxygen containing 2.5 percent atoms.
Abstract: Rates of oxidative vaporization of Cr2O3 were found to be markedly enhanced in the presence of O atoms. Investigations were conducted over the temperature range 470 to 1520 K. For Cr2O3 the enhancement was about 10 to the 9th power at 820 K in oxygen containing 2.5 percent atoms. Rapid oxidative vaporization of bare chromium was observed below 1070 K, the rate being about one-half that of Cr2O3. Results are interpreted in terms of thermochemical analysis.
4 citations
TL;DR: In this paper, the thermal decomposition of an intimate mixture of thallium(I) perchlorate and chromium(III) oxide revealed that chromium-III oxide lowers the decomposition temperature of the mixture and is oxidized into hexavalent state.
3 citations
01 May 1974
TL;DR: In this paper, a theoretical equation is given for calculating the rate from thermodynamic data by using boundary layer theory, and the activation energy obtained for the oxidative vaporation reaction corresponded numerically with the thermochemical enthalpy of the reaction.
Abstract: Rates of oxidative vaporization of Cr2O3 on preoxidized resistively heated chromium were determined in flowing oxygen at 0.115 torr for temperatures from 1270 to 1570 K. Reaction controlled rates were obtained from experimental rates by a gold calibration technique. These rates were shown to agree with those predicted by thermochemical analysis. The activation energy obtained for the oxidative vaporation reaction corresponded numerically with the thermochemical enthalpy of the reaction. A theoretical equation is given for calculating the rate from thermodynamic data by using boundary layer theory.
2 citations