Spherical grains of rare earth oxides and a manufacturing method

Details Spherical grains of rare earth oxides and a manufacturing method Spherical grains of rare earth oxides and a manufacturing method

1990-06-15

1991-10-29

Cashion, Jr., Merrell C.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

428402, 428357, 264 63, 501152, B32B 1900

Patent

active

050615602

ABSTRACT:
Inventive rare earth oxide voidless spherical grains having a mean grain diameter of from about 30-300 .mu.m formed by agglomerating a rare earth oxide powder having a mean grain diameter of 1 .mu.m or less are disclosed. An agglomeration method is disclosed comprising slurrying a rare earth oxide powder by dispersing it in water, admixing a salt of an organic acid with the slurry, and spray-drying the slurry.

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Hoffman, "Importance of Binders in Spray Dried Pressbodies", 6/26/71.
Porovkova, "The Sintering and Properties of Y.sub.2 O.sub.3 Compounds"; 11/70.

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