Stabilized zirconia a process for its preparation and its applic

Details Stabilized zirconia a process for its preparation and its applic Stabilized zirconia a process for its preparation and its applic

1986-03-03

1988-11-29

Dixon, Jr., William R.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ivb metal

423266, 423608, 501103, 501104, C04B 3548

Patent

active

047880457

ABSTRACT:
A fine powder of stabilized zirconia a process for its preparation and application of the powder in ceramic compositions to obtain good mechanical, thermomechanical and electrical properties.
A zirconia hydrate sol having a pH between 0.5 and 5 and containing elementary acicular crystals having dimensions of from about 10 to 500 .ANG. which are agglomerated into submicron aggregates of from abuot 100 to 5000 .ANG. in diameter is mixed with a solution of a stabilizing agent, preferably yttrium; the suspension is dried; the dried suspension is calcined at a temperature of from about 700.degree. C. to 1,300.degree. C. for preferably from about 30 minutes to 24 hours; and if needed, the powder obtained is milled.

REFERENCES:
patent: 3514252 (1970-05-01), Levy et al.
patent: 3645910 (1972-02-01), Woodhead
patent: 3957500 (1976-05-01), Pitts
patent: 4520114 (1985-05-01), David

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