Yttrium oxide stabilized zirconium oxide

Details Yttrium oxide stabilized zirconium oxide Yttrium oxide stabilized zirconium oxide

1986-09-25

1987-09-22

Garvin, Patrick P.

Chemistry of inorganic compounds

Rare earth compound

423266, 423608, C01F 1700

Patent

active

046954392

ABSTRACT:
A process for forming a homogeneous mixture of yttrium oxide and zirconium oxide involves dissolving yttrium oxide and hydrochloric acid in water, precipitating yttrium hydroxide by adding ammonium hydroxide to the solution and dissolving yttrium hydroxide in acetic acid, adding zirconium oxide to the resulting solution which is thereafter spray dried to yield an agglomerate having uniformly distributed yttrium acetate throughout and thereafter converting the yttrium acetate to yttrium oxide to yield an agglomerate having uniform distribution of yttrium oxide and zirconium oxide. The yttrium oxide/zirconium oxide agglomerates have a particle size of from about 20 to about 200 microns. The intermediate agglomerate contains a uniform distribution of yttrium acetate and provides a composition which can be converted to a yttrium oxide/zirconium oxide agglomerate having a homogeneous mixture of the two components.

REFERENCES:
patent: 3373119 (1968-03-01), Krystyniak
patent: 4360598 (1982-11-01), Otagiri
patent: 4619817 (1986-10-01), Stambaugh et al.

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