STABILIZED RARE EARTH OXIDES FOR A CONTROL ROD AND METHOD OF PREPARATION
A method is given for preparing mixed oxides of the formula MR/sub x/O/ sub 12/ wherein M is tungsten or molybdenum and R is a rare earth in the group consisting of samarium, europium, dysprosium, and gadolinium and x is 4 to 5. Oxides of this formula, and particularly the europiumcontaining species, are useful as control rod material for water-cooled nuclear reactors owing to their stability, favorable nuclear properties, and resistance to hydration. These oxides may be utilized as a dispersion in a stainlesssteel matrix. Preparation of these oxides is effected by blending tungsten oxide or molybdenum oxide with a rare earth oxide, compressing the mixture, and firing at an elevated temperature in an oxygen-containing atmosphere. (AEC)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-18-005353
- Assignee:
- U.S. Atomic Energy Commission
- Patent Number(s):
- US 3117372
- OSTI ID:
- 4132564
- Country of Publication:
- United States
- Language:
- English
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