Ceramic composite material consisting of aluminium oxide and zirconium oxide as main constitutents

US9795709B2 · kind B2 · utility

Assignee

• CERAMTEC GMBH · DE

Inventors

• Meinhard Kuntz · Eßlingen, DE
• Michael Kuntz · Mayville, US
• Lukas Gottwik · Bad Boll, DE
• Kristina Schilcher · Eßlingen, DE
• Andreas Morhardt · Eßlingen, DE
• Kilian Friederich · Plochingen, DE
• Norbet Schneider · Schorndorf, DE

Key dates

• Filing date: Dec 16, 2010
• Grant date: Oct 24, 2017
• Expiry date: Dec 16, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/785
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A composite material having a first phase includes an aluminum oxide proportion of at least 65% by volume and a second phase comprising a zirconium proportion of 10 to 35% by volume. The zirconium is present as zirconium oxide. The aluminum oxide is a ceramic matrix and the zirconium oxide is dispersed therein. From 90 to 99% of the zirconium oxide is present in the tetragonal phase. A chemical stabilizer for stabilizing the tetragonal phase of the zirconium oxide is also present. The total content of chemical stabilizer is <0.2 mol % relative to the zirconium oxide content.