Process variables in the preparation of UN microspheres

Conference · Fri Jul 01 00:00:00 EDT 1977 · J. Am. Ceram. Soc.; (United States)

OSTI ID:6499431

Shoup, R D

Precursor uranium dioxide plus carbon microspheres were formed by injecting a mixed urania and carbon sol into an immiscible solvent. After being reduced in hydrogen, the microspheres were heated to between 1400 and 1525/sup 0/C in Ar to form a dense intermediate mixture of UO/sub 2/ and UC. When exposed further to N/sub 2/ at temperature, a dense UN particle was formed. In an alternate method, the carbothermal conversion was performed entirely in N/sub 2/, resulting in particles of lower density. Flexibility in conversion methods and conditions permits one to obtain relatively high-purity UN microspheres with densities between 65 and 90% of theoretical.

• Research Organization: W. R. Grace and Co., Clarksville, MD
• OSTI ID: 6499431
• Journal Information: J. Am. Ceram. Soc.; (United States), Vol. 60:7-8; Conference: 70. annual meeting of the American Ceramic Society, Chicago, IL, USA, 24 Apr 1968
• Country of Publication: United States
• Language: English

Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
36 MATERIALS SCIENCE
URANIUM NITRIDES
CHEMICAL PREPARATION
CARBON
DENSITY
MICROSPHERES
NITROGEN
NUCLEAR FUELS
SYNTHESIS
TEMPERATURE DEPENDENCE
URANIUM CARBIDES
URANIUM DIOXIDE
ACTINIDE COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
CRYOGENIC FLUIDS
ELEMENTS
ENERGY SOURCES
FLUIDS
FUELS
NITRIDES
NITROGEN COMPOUNDS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PNICTIDES
REACTOR MATERIALS
URANIUM COMPOUNDS
URANIUM OXIDES
050700* - Nuclear Fuels- Fuels Production & Properties
360201 - Ceramics
Cermets
& Refractories- Preparation & Fabrication