| 摘要 |
<p>A porous honeycomb filter having a controlled pore size distribution which comprises a material containing cordierite as a primary crystal phase, characterized in that it has a pore size distribution in which the pore volu me of the pores having a pore diameter of less than 10 .mu.m is 15 % or less of the total pore volume, the pore volume of the pores having a pore diameter o f 10 to 50 .mu.m accounts for 75 % or more relative to the total pore volume, and the pore volume of the pores having a pore diameter of more than 50 .mu. m is 10 % or less of the total pore volume. The porous honeycomb filter exhibi ts improved efficiency for capturing particulate contaminants and the like, and also can prevent the increase of pressure loss due to the clogging of pores thereof, in particular, when used in a diesel engine developed in recent yea rs which adopts high pressure fuel injection, a common rail type device and the like.</p> |
