Sintered shaped body reinforced with platelets

US6452957B1 · kind B1 · utility

Assignee

• Ceramtec AG, Innovative Ceramic Engineering · DE

Inventors

• Wolfgang Burger · Burgrain, DE
• Gundula Kiefer · Wernau, DE
• Eduardo Bellido · Großenhain, DE
• Hans Andersch · Bad Boll, DE

Key dates

• Filing date: Jul 6, 2000
• Grant date: Sep 17, 2002
• Expiry date: Jul 6, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/96
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The invention relates to a sintered shaped body comprising a matrix material that contains an aluminum oxide/chromium oxide mixed crystal and an additional mixed crystal selected from at least one mixed crystal according to one of the general formulas La0.9Al11.76−xCrxO19, Me1Al11−xCrxO17, Me2Al12−xCrxO19, Me2′Al12−xCrxO19 and/or Me3Al11−xCrxO18, wherein Me1 stands for an alkali metal, Me2 represents an alkaline earth metal, Me2′ stands for cadmium, lead or mercury and Me3 represents a rare earth metal and x has a value ranging from 0.0007 to 0.045.