OXIDATION STUDIES OF URANIA-THORIA SOLID SOLUTIONS
Journal Article
·
· Journal of the American Ceramic Society (U.S.)
Nonstoichiometric solid solutions in the system UO/sub 2/-ThO/sub 2/ were formed by sintering U/sub 3/O/sub 8/-- ThO/sub 2/ and codigest ed nitrate mixtures in air. The oxygen content of the solid so lutions was determined by a weight-loss method. The changes occurring in oxygen content during solid solution formation and densification were determined for a 70.4 mole% UO/sub 2/-- 29.6 mole% ThO/sub 2/ composition formed by sintering U/sub 3/O/sub 8/-- ThO/sub 2/ in air. The first evidence of solid solution occurred at 1000 deg C and solution was complete above 1250 deg C. Thermal cycling of solid solutions in air showed a minimum oxygen-uranium ratio of 2.34 for the compositions studied. The minimum oxygen-uranium ratio obtained during thermal cycling decreased with increasing ThO/sub 2/ content. (auth)
- Research Organization:
- Argonne National Lab., Ill.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-001872
- OSTI ID:
- 4136809
- Journal Information:
- Journal of the American Ceramic Society (U.S.), Journal Name: Journal of the American Ceramic Society (U.S.) Vol. Vol: 43; ISSN JACTA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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