STABILIZED RARE EARTH OXIDES FOR A CONTROL ROD AND METHOD OF PREPARATION

Patent · Tue Jan 14 00:00:00 EST 1964

OSTI ID:4132564

McNees, R A; Potter, R A

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
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-64
• Country of Publication: United States
• Language: English

Related Subjects

CHEMISTRY
CONTROL ELEMENTS
DISPERSIONS
DYSPROSIUM OXIDES
EUROPIUM OXIDES
GADOLINIUM OXIDES
HIGH TEMPERATURE
MIXING
MOLYBDENUM OXIDES
OXIDES
OXYGEN
PREPARATION
RARE EARTHS
RODS
SAMARIUM OXIDES
STABILITY
STAINLESS STEELS
TUNGSTEN OXIDES
USES
WATER COOLANT