US Patent 7514136 Honeycomb structure

A honeycomb structure includes a bonded honeycomb segment article in which a plurality of honeycomb segments are integrally bonded on mutual bonding surfaces thereof via bonding material layers; and an outer peripheral coating layer which covers an outer peripheral surface of the bonded honeycomb segment article. The honeycomb structure has a structure in which a plurality of cells constituting fluid channels are arranged in parallel with one another in a central axis direction. Solid cells are beforehand arranged in four corners of each of opposite end faces of the honeycomb segment and/or the center of each side of an outer peripheral portion of each of the opposite end faces of the honeycomb segment, and the solid cells are integrated with the honeycomb segment.