STUDY OF THE EQUILIBRIUM OF URANIUM OXIDES BETWEEN 1200 AND 1800

Journal Article · Mon Oct 01 04:00:00 EDT 1962 · Compt. Rend

OSTI ID:4726250

Anthony, A M; Kiyoura, R; Sata, T

The equilibrium UO/sub 2.60/ in equilibrium UO/sub 2.25/ + 7/40 O/sub 2/ was studied between 1200 and 1800 deg C by sample tempering, thermobalance measurements, and x-ray diffraction. The U/sub 3/O/sub 8/ samples were held nt a given temperature in an atmosphere with known nitrogen and oxygen concentrations; they were then abruptly tempered in water, dried, and ground. The powder is,then heated in a hydrogen atmosphere and the weight loss is determined. Isobaric curves obtained show that at high temperature it is solid UO/sub 2.25/ (or U/sub 4/O/sub 9/) which is stable and that for a given partial oxygen pressure the equilibrium temperature UO/sub 2.25/- UO/sub 2.60/ is fixed. The results indicate a linear relationship between the inverse of the absolute temperature of the UO/sub 2.60/ decomposition into UO/sub 2.25/ and the log Po (partial oxygen pressure). The oxygen partial pressures were calculated for various temperatures. (J.S.R.)

• Research Organization: CNRS, Paris and Tokyo Inst. of Tech.
• NSA Number: NSA-17-008032
• OSTI ID: 4726250
• Journal Information: Compt. Rend, Journal Name: Compt. Rend Vol. Vol: 255
• Country of Publication: Country unknown/Code not available
• Language: French

Related Subjects

CHEMISTRY
DIFFRACTION
HEATING
HIGH TEMPERATURE
HYDROGEN
LOSSES
MEASURED VALUES
QUANTITATIVE ANALYSIS
TEMPERING
THERMODYNAMICS
U3O8
URANIUM OXIDES
WATER
WEIGHT
X RADIATION