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A platform for research: civil engineering, architecture and urbanism
METHODS FOR APPLYING A WASHCOAT AND HEAT TREATING A CERAMIC HONEYCOMB, AND TREATED ARTICLES
A method for treating a microcracked, ceramic substrate is provided that obviates the need for filling the microcracks of the substrate via a passivation step prior to sintering a layer of washcoat to the surfaces of the substrate that may either contain a catalyst, or provide a support layer for a catalyst subsequently applied. In the first step of the method, a slurry of particles of a washcoating composition is applied over the surface of the substrate such that particles of the composition are lodged into microcracks of the substrate. Next, the substrate is heat treated to between about 700° C. and 1300° C. The method is particularly applicable to ceramic honeycomb structures used as catalytic converters in automotive exhaust systems.
METHODS FOR APPLYING A WASHCOAT AND HEAT TREATING A CERAMIC HONEYCOMB, AND TREATED ARTICLES
A method for treating a microcracked, ceramic substrate is provided that obviates the need for filling the microcracks of the substrate via a passivation step prior to sintering a layer of washcoat to the surfaces of the substrate that may either contain a catalyst, or provide a support layer for a catalyst subsequently applied. In the first step of the method, a slurry of particles of a washcoating composition is applied over the surface of the substrate such that particles of the composition are lodged into microcracks of the substrate. Next, the substrate is heat treated to between about 700° C. and 1300° C. The method is particularly applicable to ceramic honeycomb structures used as catalytic converters in automotive exhaust systems.
METHODS FOR APPLYING A WASHCOAT AND HEAT TREATING A CERAMIC HONEYCOMB, AND TREATED ARTICLES
VERFAHREN ZUM AUFBRINGEN EINES WASHCOATS UND ZUR HITZEBEHANDLUNG EINER KERAMISCHEN WABE UND BEHANDELTE ARTIKEL
PROCÉDÉS D'APPLICATION D'UNE COUCHE D'IMPRÉGNATION ET DE TRAITEMENT THERMIQUE D'UN NID D'ABEILLE EN CÉRAMIQUE ET ARTICLES TRAITÉS
GLASSON THOMAS J (author) / MURTAGH MARTIN J (author) / SEYLER DONNA R (author)
2019-12-25
Patent
Electronic Resource
English
IPC:
B01J
Chemische oder physikalische Verfahren, z.B. Katalyse oder Kolloidchemie
,
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
/
C04B
Kalk
,
LIME
/
F01N
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
,
Schalldämpfer oder Auspuffvorrichtungen für Gase von Kraft- und Arbeitsmaschinen oder von Kraftmaschinen allgemein