Patent ID: 8591800

Claim:
A method of manufacturing a cordierite-based honeycomb structure, comprising: a spheroidizing treatment of heating particles of a first alumina source material to at least a melting temperature of alumina to provide the first alumina source material with particles having a degree of circularity of 0.70 or more; adding the first alumina source material, a second alumina source material including particles not subjected to sphcroidizing treatment, a silica source material and a magnesia source material to obtain a cordierite forming material in which only the first alumina source material particles have been subjected to the spheroidizing treatment, and wherein the first alumina source material has an average particle diameter of 1-10 μm and is added in an amount of 10 mass % or more with respect to the total mass of the cordierite forming material; adding a dispersion medium to the resultant cordierite forming material to obtain a clay; extruding the resultant clay into a honeycomb shape to obtain a formed honeycomb body in which a plurality of cells are defined by partition walls; drying the resultant formed honeycomb body to obtain a dried honeycomb body; and firing the resultant dried honeycomb body to manufacture the cordierite-based honeycomb structure.