INVESTIGATION OF URANIUM OXIDES AND URANIUM CARBIDES BY DIFFERENTIAL THERMAL ANALYSIS

Journal Article · Tue Oct 01 04:00:00 EDT 1963 · Nukleonik (West Germany) Discontinued with vol. 12

OSTI ID:4131487

von Ammon, R

Investigations of some reactions of uranium oxides and uranium carbides by differential thermal analysis are described. The oxidation of UO/sub 2/ was found to proceed in two steps, which were strongly dependent on the temperature, particle size, and partial pressure of oxygen. The oxidation is combined with a strong surface growth. The reduction of U/sub 3/O/sub 8/ was found to occur in oniy one step, which showed scarcely any dependence on particle or surface size. The surface size decreases in the course of the reduction. The oxidation of UC was found to be a strongly exothermic process, which occurred at 350 deg C and by careful control yielded U/sub 3/O/sub 8/. U/sub 3/O/sub 8/ dissociated in about 1100 deg C oxygen to a complex, UO/sub 2.25/(U/sub 4/O/sub 9/). The oxidation of a UO/sub 2/-Mo pellet led to a mixed phase, MoO/sub 3/ -U/sub 3/O/sub 8/, which melts at about 1000 deg C. (tr-auth)

• Research Organization: Kernreaktor Bau-und Betriebs-GmbH, Karlsruhe, Ger.
• NSA Number: NSA-18-003770
• OSTI ID: 4131487
• Journal Information: Nukleonik (West Germany) Discontinued with vol. 12, Journal Name: Nukleonik (West Germany) Discontinued with vol. 12 Vol. Vol: 5; ISSN NUKKA
• Country of Publication: Country unknown/Code not available
• Language: German

Related Subjects

CERMETS
CHEMICAL REACTIONS
CHEMISTRY
DECOMPOSITION
EXPANSION
GRAIN SIZE
HIGH TEMPERATURE
MOLYBDENUM
MOLYBDENUM OXIDES
OXIDATION
OXYGEN
PELLETS
PHASE DIAGRAMS
PRESSURE
REDUCTION
SURFACES
TEMPERATURE
U3O8
URANIUM CARBIDES
URANIUM DIOXIDE
URANIUM OXIDES