| 摘要 |
A honeycomb structured body of the present invention is a honeycomb structured body in which a plurality of porous ceramic members are combined with one another through an adhesive layer, each of the porous ceramic members having a plurality of cells which are allowed to penetrate in a longitudinal direction with a wall portion therebetween and either one end of which is sealed, with a catalyst supporting layer being adhered to said wall portion, wherein pores formed in said porous ceramic member are constituted by large pores having a relatively large pore diameter and small pores having a relatively small pore diameter, and supposing that: the thickness of the catalyst supporting layer is X1 (mum), and the value, obtained by multiplying the porosity (%) of said porous ceramic member by the ratio (the average pore diameter of said large pores/the average pore diameter of said small pores) of the average pore diameter of said large pores to the average pore diameter of said small pores, is Y1, these X1 and Y1 are allowed to satisfy the following inequalities (1) and (2): <?in-line-formulae description="In-line Formulae" end="lead"?>6X1+80.5<=Y1<=6X1+230.5 (1)<?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?>-6X1+330<=Y1<=-6X1+474 (2).<?in-line-formulae description="In-line Formulae" end="tail"?>
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