ON THE PROPERTIES OF POWDERED AND MASSIVE UO$sub 2$ AND U$sub 4$$O$$sub 9$

Journal Article · Tue Oct 01 00:00:00 EDT 1963 · Funtai Oyobi Funmatsuyakin (Japan)

OSTI ID:4033899

Amanuma, T; Sakamoto, K

Samples of ceramic-grade UO/sub 2/ powder (O/U = 2.08) and crushed massive samples (0.325 mesh) of electrodeposited UO/sub 2/(O/U = 2.00/sub 5/), fused UO/sub 2/(O/U = 2.00/sub 3/), and electrodeposited U/sub 4/O/sub 9/-x(O/U = 2.10) were used to study oxidation behavior and crystal structure. Results of x- ray analysis and infrared spectrophotometry of heated samples, DTA curves, and the relationship between heating temperature and the O/U ratio of the samples are presented. The oxidation behavior of the samples were found to be substantially the same: UO/sub 2/(cubic) or U/sub 4/O/sub 9/-x(cubic) 200 to 400 deg C yields U/sub 3/O/sub 7/(tetragonal) 340 to 425 deg C yields U/sub 3/O/sub 8/ (orthorhombic). Differences in the crystal transformation temperature of individual samples may be due to particle size and surface activity. Using infrared spectrophotometry, a small absorption at 15.3 mu was recognized, which might be caused by the U/sub 3/O/sub 7/ phase. The electrodeposited U/sub 4/O/sub 9/-x single crystal was diamond shaped and very thin, quite different from the octahedron shape of electrodeposited UO/sub 2/. The regular triangular etch pits on the diamond-shaped face of the U/sub 4/O/sub 9/-x crystal show that this face is identical with the (111) face of the UO/sub 2/ crystal. (from NSA of Japan)

• Research Organization: Atomic Fuel Corp., Tokyo
• NSA Number: NSA-18-018369
• OSTI ID: 4033899
• Journal Information: Funtai Oyobi Funmatsuyakin (Japan), Journal Name: Funtai Oyobi Funmatsuyakin (Japan) Vol. Vol: 10; ISSN FOFUA
• Country of Publication: Country unknown/Code not available
• Language: Japanese

Related Subjects

ABSORPTION
CERAMICS
CONFIGURATION
CRYSTALS
DIAGRAMS
DIAMONDS
ELECTRODEPOSITION
GRAIN SIZE
INFRARED RADIATION
MELTING
METALS, CERAMICS, AND OTHER MATERIALS
MONOCRYSTALS
OXIDATION
POWDERS
REACTION KINETICS
SAMPLING
SOLIDS
SPECTROMETERS
SURFACES
TEMPERATURE
THICKNESS
URANIUM DIOXIDE
URANIUM OXIDES
X RADIATION