| abstract |
A ceramic honeycomb structure suitable for particulate filters, having an inlet face and an outlet face, comprising a plurality of inlet cells and a plurality of outlet cells extending through the structure from the inlet face to the outlet face, the inlet cells being open at the inlet face and closed where adjoining the outlet face, and the outlet cells being open at the outlet face and closed where adjoining the inlet face. The inlet and/or outlet cells are quadrangular in cross- section and are arranged in an alternating pattern; the outlet cells may have a cross - sectional area generally smaller than that of inlet cells and have an acute interior angle, and no point of a given inlet cell is closer to an adjacent inlet cell than to an adjacent outlet cell. A process for preparing the ceramic honeycomb structure is also disclosed. |