Honeycomb stucture

Abstract

There is provided a honeycomb structure which is excellent in such a resistance to thermal shock as to prevent generation of cracks or dissolved losses in partition wall intersections as critical damages for a filter and which is capable of securing a sufficient bonding strength to partition walls even in a case where plugging portions have a high porosity. A honeycomb structure includes: porous partition walls arranged to define cells connecting two end faces to each other; and plugging portions arranged to plug the cells in either end face. A porosity of each plugging portion is 50 to 90%, and an area of pores each having a sectional area of 0.15 mm2 or more is 30% or more of a total pore area, the sectional area occupying an arbitrary section including a central axis of the plugging portion.

Dependencies are inferred from the claim text.