HONEYCOMB FILTER FOR CLEANING EXHAUST GAS, AND PROCESS FOR ITS PRODUCTION

摘要

A honeycomb filter for removing solid particles containing carbon as their main component in an exhaust gas, characterized in that the material of said honeycomb filter is the aluminum titanate prepared by firing, at 1250 to 1700~C, a raw material mixture containing 100 parts by mass of a mixture (referred to as an X component) containing TiO2 and Al2O3 in a mole ratio of the former/the latter of 40 to 60/60 to 40 and 1 to 10 parts by mass of alka li feldspar represented by the empirical formula: (NayK1-y)AlSi3O8 [wherein 0 & lt;= y <= 1], an oxide having a spinel structure and containing Mg, or MgO or an Mg compound being converted to MgO by firing (referred to as a Y component): an d a method for manufacturing the honeycomb filter. The above honeycomb filter is excellent in the resistance to heat and thermal shock and exhibits high resistance to thermal decomposition and great mechanical strength, and thus can be used with stability even under fluctuating high temperature condition s.