Please use this identifier to cite or link to this item: doi:10.22028/D291-24342
Title: Experiences with sol-gel bonded high porosity alumina fiber materials for filter applications
Author(s): Handrick, Karin E.
Mohlratzer, August
Ostertag, Rolf
Sporn, Dieter
Schmidt, Helmut K.
Language: English
Year of Publication: 1988
OPUS Source: Better ceramics through chemistry III : symposium held April 5-8, 1988, Reno, Nevada, U.S.A / editors, C. Jeffrey Brinker … - Pittsburgh : Materials Research Society, 1988. — (Materials Research Society symposia proceedings ; 121), S. 611-615
SWD key words: Aluminium
DDC notations: 620 Engineering and machine engineering
Publikation type: Conference Paper
Abstract: High porous alumina fiber structures appear promising for hot gas filtration in particular for diesel particulate traps. For this purpose, however, a method is required for manufacturing of stable shapes resisant to the blow-out by the gas flow. The sol-gel process was expected to be the best suited method for fiber bonding to provide the required stability. The main tasks of the development-work were a uniform isotropic fiber-distribution, the adaptation of the sol-gel-process to the application, and the deliberate synthesis of the gel-derived alumina bonding phase. The appropriate fibrous structure was obtained by a repeated filtration of sol/fiber suspensions. The properties of the ceramic binder were adapted by concentrating the sol and/or adding aluminas or aluminium hydroxides. Testing of prototypes with optimized structures has shown, however, that the stability of the structure decreased after thermal load. The thermal fatigue of alpha-Al2O3 is assumed to be responsible for this failure.
Link to this record: urn:nbn:de:bsz:291-scidok-26361
ISBN: 0-931837-91-X
Date of registration: 30-Dec-2009
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
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