| 摘要 |
A glow plug includes a ceramic heater (1) having a resistance-heating element (11) embedded at its end portion. In order to supply electricity to the resistance-heating element (11), first and second heater terminals (12a, 12b) are exposed on the surface of the ceramic heater (1). First and second terminal rings (14, 3), which serve as metallic fitting members, are shrink-fitted to the surface of the ceramic heater (1) in such a manner as to cover and be electrically connected to the exposed first and second heater terminals (12a, 12b). A metal layer (41) not higher than Ni in ionization tendency is formed on the inner circumferential surface of each of the first and second terminal rings (14, 3). <IMAGE> |
