| 摘要 |
A honeycomb structure including a plurality of cells arranged in parallel while being separated by cell walls, and extending in a longitudinal direction of the honeycomb structure. Each cell is sealed at one of end portions thereof. In the honeycomb structure, the relation expressed by an expression (1) is satisfied: 11/6−10/3×A≦̸B  (1) where A (mm) designates thickness of the cell walls, and B (m2/cm3) designates a surface area per unit volume of the cell walls.
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