| 摘要 |
The invention proposes a ceramic honeycomb structural body excellent in the removal property of the harmful gas such as HC, NOx and the like discharged from internal combustion engines and the catalyst reactivity. The ceramic honeycomb structural body comprises a pillar-shaped honeycomb structural porous ceramic member formed by arranging a plurality of through holes as a gas path side by side through partition walls or a combination thereof, in which the ceramic honeycomb structural body is a sintered body having a pore structure in which one or more peaks (the maximum value) exist in each region of a first pore group of pores having a pore size of 0.05 to 150 µm and of a second pore group of pores having a pore size of 0.006 to 0.01 µm.
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