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METHODS FOR MANUFACTURING POROUS CERAMIC FILTERS AND COMPOSITIONS FOR APPLYING TO CERAMIC HONEYCOMB BODIES
Disclosed are compositions for applying to honeycomb bodies. The compositions can be used as plugging mixtures for forming a ceramic wall flow filter. Alternatively, the compositions can be used to form skin coatings on exterior portions of a honeycomb body. The disclosed compositions include an inorganic powder batch composition, an organic binder, a liquid vehicle, and a rheology modifier. The compositions exhibit improved rheological properties, including an increased yield strength and reduced viscosity under shear, which, among various embodiments, can enable the manufacture of sintered phase end plugs having reduced levels of dimple and pinhole formations in the final dried and fired end plugs as well as end plugs having relatively uniform and desired depths. Also disclosed are methods for forming end plugged ceramic wall flow filters from the plugging mixtures disclosed herein.
METHODS FOR MANUFACTURING POROUS CERAMIC FILTERS AND COMPOSITIONS FOR APPLYING TO CERAMIC HONEYCOMB BODIES
Disclosed are compositions for applying to honeycomb bodies. The compositions can be used as plugging mixtures for forming a ceramic wall flow filter. Alternatively, the compositions can be used to form skin coatings on exterior portions of a honeycomb body. The disclosed compositions include an inorganic powder batch composition, an organic binder, a liquid vehicle, and a rheology modifier. The compositions exhibit improved rheological properties, including an increased yield strength and reduced viscosity under shear, which, among various embodiments, can enable the manufacture of sintered phase end plugs having reduced levels of dimple and pinhole formations in the final dried and fired end plugs as well as end plugs having relatively uniform and desired depths. Also disclosed are methods for forming end plugged ceramic wall flow filters from the plugging mixtures disclosed herein.
METHODS FOR MANUFACTURING POROUS CERAMIC FILTERS AND COMPOSITIONS FOR APPLYING TO CERAMIC HONEYCOMB BODIES
VERFAHREN ZUR HERSTELLUNG VON PORÖSEN KERAMISCHEN FILTERN UND ZUSAMMENSETZUNGEN ZUM AUFTRAGEN AUF KERAMISCHE WABENKÖRPER
MÉTHODES DE FABRICATION DES FILTRES POREUX CÉRAMIQUES ET COMPOSITIONS POUR L'APPLICATION À DES CORPS EN NID D'ABEILLES EN CÉRAMIQUE
BOOKBINDER DANA C (author) / GRIFFIN JAMES A JR (author) / TENNENT DAVID L (author) / WU LUNG-MING (author)
2020-09-02
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
CEMENT COMPOSITIONS FOR APPLYING TO CERAMIC HONEYCOMB BODIES
| European Patent Office | 2018
OUTLET-COATED CERAMIC HONEYCOMB BODIES AND METHODS OF MANUFACTURING SAME
| European Patent Office | 2021