| 主权项 |
1. A honeycomb structure comprising:
a center part including a cylindrical honeycomb structure part and a pair of electrodes provided on a side face of the honeycomb structure part, the honeycomb structure part having a porous partition wall and an outer circumferential wall around the porous partition wall, the porous partition wall defining a plurality of cells extending from one end face to the other end face, the plurality of cells defining fluid passages; and an outer circumferential part provided around the center part, wherein an electric resistivity of the honeycomb structure part is 1-200 Ωcm, each electrode in the pair of electrodes is formed in a band shape that extends in an extending direction of the cells of the honeycomb structure part, one electrode in the pair of electrodes is located opposite the other electrode in the pair of electrodes over a center of the honeycomb structure part, when viewed in a cross section taken in a direction perpendicular to the extending direction of the cells, the outer circumferential part has a porous partition wall and an outer circumferential wall at an outermost circumferential position, the porous partition wall defining a plurality of cells extending from one end face to the other end face, the plurality of cells defining fluid passages, and a volumetric heat capacity of the outer circumferential part is smaller than a volumetric heat capacity of the center part. |
