Process for preparing zirconia sols and/or zirconia forms

Details Process for preparing zirconia sols and/or zirconia forms Process for preparing zirconia sols and/or zirconia forms

1991-08-06

1993-08-24

Derrington, James

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

252309, 501 12, 501103, 501104, C04B 3548

Patent

active

052386252

ABSTRACT:
Zirconia sols are prepared by hydrolyzing zirconium alkoxides by aqueous hydrogen peroxide in the presence of an acid, evaporating the hydrolysates to dryness, and redispersing the dried hydrolysates in an organic solvent and the sols can be used for the preparation of zirconia forms in a desired shape satisfactorily on a commercial scale with removal of as much residual carbon as possible and without foaming in the gelation and molding steps.

REFERENCES:
patent: 4429051 (1984-01-01), Davidge
patent: 5047174 (1991-09-01), Sherif
Japanese Article, "ZrO.sub.2 Fibers Prepared by Sol-Gel Method", by Tosinobu Yoko and Kanichi Kamiya, published in Fine Ceramics, 1988.
Japanese Article, "Parameters that Affect the Hydrolysis of Zirconium Alkoxide and Preparation of Monolithic Gels", by Hajime Saito, Hisao Suzuki and Hiroaki Hayashi, published in The Chemical Society of Japan, pp. 1571-1577, dated 1988.

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