HONEYCOMB STRUCTURE COMPRISING A CEMENT SKIN COMPOSITION WITH CRYSTALLINE INORGANIC FIBROUS MATERIAL

Disclosed is a honeycomb support structure comprising a honeycomb body and an outer layer or skin formed of a cement that includes an inorganic filler material having a first coefficient of thermal expansion from 25 C to 600 C and a crystalline inorganic fibrous material having a second coefficient...

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Bibliographische Detailangaben
Hauptverfasser: Chapman Thomas Richard, Lewis Mark Alan, Kerr Christopher Lane, Locker Robert John, St Clair Todd Parrish, Drury Kenneth Joseph, Bubb Keith Norman, Sarma Huthavahana Kuchibhotla
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:Disclosed is a honeycomb support structure comprising a honeycomb body and an outer layer or skin formed of a cement that includes an inorganic filler material having a first coefficient of thermal expansion from 25 C to 600 C and a crystalline inorganic fibrous material having a second coefficient of thermal expansion from 25 C to 600 C. Skin cement composition controls level of cement liquid/colloid components, for example water, colloidal silica, and methylcellulose migration into the substrate during the skin application process to form barrier to skin wetting and staining during the washcoating process.