Open-cell expanded ceramic with a high level of strength, and process for the production thereof

US6635339B1 · kind B1 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Joerg Adler · Meißen, DE
• Michael Teichgraeber · Coswig, DE
• Gisela Standke · Dresden, DE
• Helmut Jaunich · Raesfeld, DE
• Heike Stoever · Dresden, DE
• Reinhard Stoetzel · Borken, DE

Key dates

• Filing date: May 24, 1999
• Grant date: Oct 21, 2003
• Expiry date: May 24, 2019

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/249969
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The disclosed invention relates to the field of ceramics and concerns an open-cell expanded ceramic which may be used in the form of a deep-bed filter, and a process for the production thereof. The primary object is to produce an open-cell expanded ceramic by a simple and economical process. This object is attained by an open-cell expanded ceramic in which the inner cavities, cracks and the porosity of the ceramic members are filled partially or completely by one or a plurality of metal and/or ceramic phases and/or glass phases. The open-cell expanded ceramic is also produced in that during or after sintering the cavities, cracks and the porosity of the ceramic members are partially or completely filled with a melt or a suspension which melt below the melting temperature of the expanded ceramic, have a coefficient of expansion similar to the coefficient of expansion of the expanded ceramic, and a very good wetting capacity, and only react partially or not at all with constituents of the expanded ceramic.