Ceramic honeycomb structure with grooves and outer coating, process of producing the same, and coating material used in the honeycomb structure.

摘要

A ceramic honeycomb structure is disclosed which includes a ceramic honeycomb body having a matrix of partition walls (4) forming a multiplicity of cells (6) extending in an axial direction of the honeycomb body. The radially outermost array of the cells are open to an outside of the honeycomb body in radial directions thereof, to provide a plurality of grooves (12) formed in an outer periphery of the honeycomb body to extend in the axial direction. The honeycomb structure further includes an outer coating (16) which fills at least the grooves to cover the outer periphery of the ceramic honeycomb body, so as to provide an outer surface of the honeycomb structure. Also disclosed are a process of producing such a honeycomb structure, and a coating material used for forming the outer coating as described above.