Patent ID: 8535405

Claim:
A honeycomb structure comprising: a cylindrical honeycomb structural section having porous partition walls separating and forming a plurality of cells functioning as fluid passages and extending over from one end face to the other end face and an outer peripheral wall located in the outermost periphery, a pair of lateral electrodes disposed on a side face of the honeycomb structural section, and at least one intermediate layer between the honeycomb structural section and each of the pair of lateral electrodes; wherein each of the honeycomb structural section, the pair of lateral electrodes and the at least one intermediate layer contain silicon carbide particles as a framework material and silicon as a bonding material for bonding the silicon carbide particles together, the silicon carbide particles as the framework material for the honeycomb structural section have an average particle diameter of 3 to 40 μm, and the ratio (Si/SiC) of silicon (Si) to silicon carbide (SiC) is 10/90 to 40/60, the pair of lateral electrodes have an average particle diameter of the silicon carbide particles of 10 to 70 μm, and the ratio (Si/SiC) of silicon (Si) to silicon carbide (SiC) is 20/80 to 50/50, the at least one intermediate layer has an average particle diameter of the silicon carbide particles of 3 to 70 μm and a ratio of silicon (Si) to silicon carbide (SiC) of 10/90 to 50/50, and an electric resistance between the lateral electrodes is 2 to 100Ω.