Preparation of mixed powders

Details Preparation of mixed powders Preparation of mixed powders

1995-04-24

1996-06-11

Marcantoni, Paul

Compositions: ceramic

Ceramic compositions

Refractory

501104, 501105, 423608, C04B 3548

Patent

active

055255590

ABSTRACT:
A method of preparing a mixture of zirconia and a stabilising agent for the zirconia comprises milling an aqueous suspension of particulate zirconia and particulate stabilising agent in a bead mill for at least 2 minutes in the presence of a particulate mixing medium having an average particle size from 0.2 mm to 3 mm. Preferred stabilising agents are oxides of yttrium, cerium, calcium or magnesium. Surprisingly, ceramics prepared from the product mixture are more resistant to degradation by attack from water above 100.degree. C. than are ceramics prepared from coprecipitated powders.

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