| abstract |
A honeycomb structural body 20 includes a porous separation section 22 that forms a plurality of cells each serving as a flow path for a fluid, and in the separation section 22, the average pore diameter is 10 to 20 μm and the wet area ratio R (= S / V), which is the Ratio of the wet area S of pores to the volume V of the partition portion 22 is 0.000239 μm -1 or more. In the honeycomb structural body 20, the partitioning portion 22 may have a porosity of 50% to 65%. In a raw material mixing step, the honeycomb structural body 20 may be manufactured so that 100 mass% of a ceramic raw material, 2 mass% or more of a water-absorbent polymer before water absorption, whose average particle diameter is 20 μm or more after water absorption, and 0, 5 mass% or more of zirconia are contained as ingredients of a molding raw material. |