High porosity honeycomb and method
US7442425B2 · kind B2 · utility
19Cited by
8References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 30, 2003 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Apr 2, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24157
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A ceramic honeycomb substrate for use in an automotive catalytic converter system which exhibits improved light-off performance by virtue of a high porosity of 45 to 75% while still maintaining a wall thickness of greater than 2.0 mil (0.0020 inch, 0.0508 mm), preferably 2.5 mil (0.0025 in., 0.0635 mm) to 7 mil (0.0070 in., 0.1778 mm), and more preferably 2.5 mil (0.0025 in., 0.0635 mm) to 3 mil (0.0030 in., 0.0762 mm). The median pore size is in the range of 2-10 micrometers, and a coefficient of thermal expansion (CTE) (25-800° C.) of less than 15×10−7/° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.