EXHAUST GAS PURIFYING FILTER

摘要

An exhaust gas purifying filter which uses as a filtering layer partition walls dividing through holes and formed by sealing one ends of specified through holes and the other ends of the remaining through holes of a honeycomb structure consisting of a porous ceramic material and having many through holes, wherein each partition wall has a thickness of up to 250 mu , a porosity of at least 40%, and an average pore diameter of 3-7 mu , and the volume of pores having a pore diameter of at least 10 mu accounts for up to 20% of the total pore volume. The filter can improve characteristics for trapping fine solid particles up to 0.08 mu in size without increasing a pressure loss.