| 摘要 |
A filter for exhaust gas purification has a honeycomb structure made of a porous ceramic material and having a large number of channels, both given channels at one end of the honeycomb structure and the remaining channels at the other end of the honeycomb structure being plugged so as to be able to use the partition walls of the honeycomb structure surrounding the channels, as a filter layer for exhaust gas, wherein the thickness of the partition walls is 250 mu m or less, the porosity is 40% or more, the average pore diameter is 3 to 7 mu m, and the volume of the pores having diameters of 10 mu m or more is 20% or less relative to the volume of the total pores. This exhaust gas purification filter has improved trapping efficiency for fine solid particulates of 0.08 mu m or less while giving rise to no increase in pressure loss. <IMAGE> |
