Honeycomb filter for exhaust gas decontamination
US7309370B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2003 |
| Grant date | Dec 18, 2007 |
| Priority date | — |
| Expiry date | Dec 9, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A honeycomb filter for purifying exhaust gases, which makes it possible to alleviate a thermal stress generated due to occurrence of a local temperature change, is less likely to generate cracks, and is excellent in strength and durability. The honeycomb filter has a structure in which a plurality of column-shaped porous ceramic members, each having a number of through holes that are placed side by side in the length direction with a partition wall interposed therebetween, are combined with one another through adhesive layers so that the partition wall that separates the through holes are allowed to function as a filter for collecting particulates. A thermal expansion coefficient αL of the adhesive layer and a thermal expansion coefficient αF of the porous ceramic member is as follows:0.01<|αL−αF|/αF<1.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.