US Patent 7556666 Honeycomb structure

A honeycomb structure including a plurality of porous ceramic members which are bonded through an adhesive layer, each of the porous ceramic members has a plurality of cells, which are arranged in parallel while being separated by cell walls. The cells extend in a longitudinal direction of the honeycomb structure. In the honeycomb structure, the following relationship is satisfied:2≦B≦100/3×A−10/3  (1)where A (g/cm3) designates apparent density of the porous ceramic members, and B (GPa) designates Young's modulus of the adhesive layer.