| 摘要 |
There is provided a honeycomb structure 10 comprising a honeycomb segment joined body 10 having a plurality of honeycomb segments 2 integrally joined with one another at a joint face of each of the honeycomb segments by means of a bonding material layer 9 and having a plurality of cells 5 functioning as fluid passages disposed in parallel with one another in a direction of central axis. Porosity in an outside portion of the bonding material layer 9 (portion from the interface of the joint face of honeycomb segments to the point corresponding to 20% thickness of the total bonding material layer) is smaller than that in the central portion located on the inner side of the outside portion.
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