Patent ID: 7056568
Filing Date: 2006-06-06
Classification: B01D,B01J,B28B,B32B,C04B,F01N,Y02T,Y10T

Abstract:
1. A honeycomb structure formed by bonding a plurality of honeycomb segments into one piece, via a bonding layer, the honeycomb segment having an outer wall, partition walls provided inside the outer wall, and a large number of through-holes divided by the partition walls and extending in the axial direction of the segment, comprising the outer wall and the bonding layer having a relation of wherein κc (W/mK) and dc (cm) are respectively the thermal conductivity and thickness of the outer wall, κa (W/mK) and da (cm) are respectively the thermal conductivity and thickness of the bonding layer formed on the outer wall, and κ (W/mK) and d (cm) are respectively the thermal conductivity and thickness of a layer which is the sum of the outer wall and the bonding layer; wherein a ratio of the thermal conductivity κs of the honeycomb segment to the thermal conductivity κa of the bonding layer is 5 to 300; and wherein the outer wall is formed by firing of a raw material containing a particulate substance S, and the bonding layer contains a particulate substance A having an average particle diameter of 1/100 to ½ relative to the average particle diameter of the particulate substance S.