Patent ID: 8232227

Claim:
A honeycomb structured body in which plural pillar-shaped honeycomb units are bonded to one another through sealing material layers, each unit having in the longitudinal direction a large number of cells placed in parallel with a cell wall therebetween, wherein: all of the cells are open on an end face of the honeycomb unit, a cross-sectional area of said honeycomb unit on a cross section perpendicular to the longitudinal direction ranges from about 5 cm 2 and to about 50 cm 2 , a specific surface area per unit volume of the honeycomb structured body ranges from 37,884 m 2 /L to 40,110 m 2 /L, each of said honeycomb unit comprises inorganic particles and at least one member chosen from inorganic fibers and whiskers, said inorganic particles comprises at least one member chosen from alumina, silica, zirconia, titania, ceria, mullite, and zeolite, said honeycomb unit is fired at a temperature ranging from 600° C. to 1200° C., and a Young's modulus of said honeycomb unit is at least about 50% and at most about 140% of a Young's modulus of said sealing material layer.