Method for producing stabilized zirconium oxide powder

US5420086A · kind A · utility

Assignee

• Nukem, LLC · DE

Inventors

• Egbert Brandau · Alzenau, DE
• Martin Kadner · Hamburg, DE
• Edwin Brauneis · Rodenbach, DE

Key dates

• Filing date: Nov 3, 1993
• Grant date: May 30, 1995
• Expiry date: Nov 3, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/3246
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to methods for producing stabilized zirconium oxide powder suitable for pressing shaped elements and subsequent sintering to provide high-density ceramic materials. To this end, an aqueous solution of a zirconium salt containing an additive is converted into droplets. The droplets formed are solidified, by the action of ammonia, into gel particles which are then washed, dewatered dried and calcined.