Patent ID: 7470302

Claim:
A honeycomb structure comprising porous partition walls disposed so as to form a plurality of through holes extending from one end portion to the other end portion in A-axis direction, and containing cordierite as a main component; wherein, when porosity is P(%), compressive strength in the A-axis direction is C(MPa), and open frontal area is A(%), a relation of Z 1=0.5 in the following formula (1): C ≧(600 e −0.0014AP )+ Z 1(1) is satisfied, and wherein the cordierite-forming raw material contains an aluminum source raw material, kaolin, talc, and silica, with the aluminum source raw material having an average particle diameter of 1 to 6 μm, kaolin having an average particle diameter of 1 to 10 μm, and talc and silica each having an average particle diameter of 10 to 60 μm.