Metallic oxides

Details Metallic oxides Metallic oxides

1992-11-03

1994-08-09

Group, Karl

Coating processes

Particles, flakes, or granules coated or encapsulated

Inorganic base

501103, B05D 700

Patent

active

053365216

ABSTRACT:
A process for coating particulate zirconia for use in ceramics is claimed. The particulate zirconia is coated with a hydrous oxide of a stabilizing metal such as yttrium, an alkaline earth metal or a rare earth metal by hydrolysis of a salt of the metal. An initial dispersion of the zirconia is prepared at a pH above 7.5 and, preferably, in the presence of an organic dispersing agent.
The coated zirconia produced according to the process has been shown to form ceramic bodies with a higher strength than those prepared from particulate zirconia coated by prior known processes.

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patent: 4999182 (1991-03-01), Baumard et al.
patent: 5017532 (1991-05-01), Sonnenberg et al.
patent: 5104832 (1992-04-01), Michel et al.

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