Patent ID: 8128722

Claim:
A honeycomb filter for purifying exhaust gases, comprising: a plurality of columnar porous ceramic members each having a partition wall and a plurality of through holes, said through holes extending in parallel with one another in a length direction of said columnar porous ceramic members, said partition wall separating said through holes and configured to filter particulates in an exhaust gas, said through holes of each of said columnar porous ceramic members including ones sealed at an inlet side of said columnar porous ceramic members and ones sealed at an outlet side of said columnar porous ceramic members such that the exhaust gas enters from the inlet side, passes through the partition wall and flows out from the outlet side; and an adhesive layer combining said columnar porous ceramic members with one another and having a plurality of pores adjusting a thermal expansion coefficient of said adhesive layer to be α L , said adhesive layer being formed by drying and solidifying an adhesive paste comprising a plurality of inorganic particles and a pore forming material, wherein said columnar porous ceramic members comprise silicon carbide, said columnar porous ceramic members have a porosity which is set in a range of about 40% to 80%, said columnar porous ceramic members have a thermal expansion coefficient α F , and said thermal expansion coefficient α L of said adhesive layer and said thermal expansion coefficient α F of said columnar porous ceramic members satisfy a relationship, 0.58≦|α L −α F |/α F <1.0.