Electrode structure for high temperature heated body

摘要

An electrode for connecting an external electric wire to a heated body heated to a high temperature. The electrode of this invention comprises a high temperature side electrode made of a conductor connected to the heated body, and a low temperature side electrode connected at one of the ends thereof to the high temperature side electrode and at the other end thereof to the external electric wire. The low temperature side electrode is formed by covering a conductor disposed at the center by a covering material through an insulating material, and the conductor of the low temperature side electrode is made of a material having a smaller conduction resistance than that of the conductor of the high temperature side electrode. Because the conductor of the low temperature side electrode is made of the material having a smaller conduction resistance than that of the conductor of the high temperature side electrode, the increase of the resistance value can be restricted even when the conductor is extended so that the temperature of the connecting portion with the external electric wire becomes lower.