Method of manufacturing an exhaust gas purifying filter

摘要

An exhaust gas purifying filter that does not break and melt and has high capacity to remove particulate matter, and a method of manufacturing the same, are provided. The exhaust gas purifying filter 7 is made of a ceramic material in a honeycomb structure comprising introduction passages 2 for introducing exhaust gas that includes particulate matter emitted from an internal combustion engine, porous walls 5 that collect the particulate matter and exhaust passages 3 for exhausting the exhaust gas after the particulate matter has been removed therefrom, with the porous walls supporting a catalyst for oxidizing and removing the particulate matter, wherein the porosity of the porous wall is in a range from 55 to 80%, the mean pore size is in a range from 30 to 50 mu m, and the total volume X of the pores included in the exhaust gas purifying filter and the volume Y of the pores that are not smaller than 100 mu m satisfy the relation of inequality Y/X