Process for the preparation of dispersion ceramics

US4322249A · kind A · utility

Assignee

• Max-Planck-Gesellschaft · DE

Inventors

• Nils Claussen · Schwäbisch Hall, DE
• Jurgen Jahn · Mindelheim, DE
• Gunter Petzow · Echterdingen, DE

Key dates

• Filing date: Jul 14, 1980
• Grant date: Mar 30, 1982
• Expiry date: Jul 14, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B35/593
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

In a process for the production of dispersion ceramics by sintering or hot pressing of a mixture of a matrix-forming ceramic material and of at least one ceramic embedment material dispersible therein which at the sintering temperature of the ceramic and at room temperature is present in different enantiotropic solid modifications of different densities, a ceramic embedment material is employed which is divided into at least two groups of different, substantially uniform particle sizes, each group having different lower phase-transition temperatures.