Dental ceramics and method for the manufacture thereof

US7566674B2 · kind B2 · utility

Assignee

• Forschungszentrum Karlsruhe GmbH · DE

Inventors

• Joachim Binder · Oberpurbach, DE
• Jurgen Hausselt · Langenselbold, DE
• Hans-Joachim Ritzhaupt-Kleissl · Walldorf, DE
• Nadja Schlechtriemen · Eschen, LI
• Stefan Stolz · Waldershof, DE

Key dates

• Filing date: Feb 12, 2007
• Grant date: Jul 28, 2009
• Expiry date: Feb 12, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/9661
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

In dental ceramics containing zirconium dioxide and silicon-dioxide with a Zr/Si ratio of between 0.5 and 1.0, 1 to 12 wt % of aluminum oxide and up to 2 wt % of an alkali- or earth alkali metal oxide, those materials are selectively mixed with yttrium-stabilized zirconium dioxide with a Zr/Si ratio of the mixture being between 0.5 and 1 wt % and also a silicon organic compound as well as a compression aid, and a green body is formed from the mixture by milling, which green body is then sintered.