High porosity cordierite ceramic honeycomb article and method
US7541303B2 · kind B2 · utility
6Cited by
9References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 2005 |
| Grant date | Jun 2, 2009 |
| Priority date | — |
| Expiry date | Nov 16, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/9607
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides materials and methods for the manufacture of high porosity ceramic exhaust filters employing relatively low amounts of pore formers, the filters combining efficient diesel particulate filtration with effective support for exhaust emissions control catalysts. Cordierite-forming ceramic batches comprising non-hydrated transition alumina powders of relatively large particle size provide high porosities with well-controlled pore sizes and with low filter thermal expansion coefficients and good mechanical strengths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.