Stabilized zirconia particulates

Details Stabilized zirconia particulates Stabilized zirconia particulates

1987-03-16

1988-11-22

Doll, John

Chemistry of inorganic compounds

With additive

Additive contains metal, boron, or silicon

423608, C01G 2500

Patent

active

047864869

ABSTRACT:
Submicronic zirconia particulates containing stabilizing amounts of yttrium or cerium, well adapted for ceramics applications, are produced by (i) admixing an aqueous suspension of zirconium fluosulfate particles having a pH of from about 0 to 3 with an aqueous solution of a salt of yttrium or cerium, (ii) neutralizing the resulting mixture at a pH of at least 7, (iii) separating a mixture of zirconium/yttrium or zirconium/cerium hydroxides from the medium of neutralization, (iv) washing said mixture of hydroxides to eliminate sulfate and fluoride ions therefrom, and then (v) calcining said mixture of hydroxides.

REFERENCES:
patent: 3514252 (1970-05-01), Levy, Jr. et al.
patent: 3672825 (1972-06-01), Gambale et al.
patent: 4605631 (1986-08-01), Rossi
patent: 4639356 (1987-01-01), O'Toole et al.
patent: 4664894 (1987-05-01), Suzuki et al.

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