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Volatile products from the interaction of KCl(g) with Cr2O3 and LaCrO3 in oxidizing environments

Author
Miller, R. A.
Published
JAN 1, 1977.
Physical Description
1 electronic document
Additional Creators
Kohl, F. J., Stearns, C. A., Fryburg, G. C., and Dillard, J. G.
Online Version

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Unclassified, Unlimited, Publicly available.
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Summary
Cooled target collection techniques and high pressure mass spectrometric sampling were used to measure the relative rates of oxidative vaporization and to identify the volatile products emanating from samples of chromia and Mg-doped lanthanum chromite. The materials were exposed to partial pressures of KCl with and without H2O in one atmosphere of slowly flowing oxygen at elevated temperatures. Chromia and fresh samples of lanthanum chromite exhibited enhanced rates of oxidative vaporization upon exposure to these reactants. Mass spectrometric identification showed that the enhancements resulted from the heterogeneous formation of complex molecules of the type KCl sub 1,2,3 CrO3 and KOH sub l,2 CrO3. Lanthanum chromite that had undergone prolonged oxidative vaporization exhibited no enhanced oxidation upon exposure to the reactants.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19780005215.
Accession ID: 78N13158.
NASA-TM-73795.
Symp. on High Temp. Metal Halide Chem.; 9-14 Oct. 1977; Atlanta.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15730445