| 摘要 |
PROBLEM TO BE SOLVED: To provide an insulating ring, in which each of the connection part of the insulating ring with a solid electrolytic tube and the connection part of the insulating ring with a metallic member can form a connection part which is highly reliable with respect to thermal or mechanical stress by providing a projection on at least a part of the upper end surface and/or lower end surface of the insulating ring. SOLUTION: Since projections on the upper end surface and/or lower end surface of an insulating ring is provided as the contact surface with a setter in the baking thereof, the projection does not necessarily have to be on the outer periphery side of the upper end surface or the inner periphery side of the lower end surface, but may be located on the inner periphery side of the upper end surface or the outer periphery side of the lower end surface. When the projections are provided on both the upper and lower end surfaces, baking can be performed in the state where the projection on either of the upper and lower end surfaces is set on the lower side and touched to the setter. Since the part making contact with a baking jig is limited to only the projection in this insulating ring, the surface roughness of the connecting part with metal will not deteriorate, the contacting area is also significantly minimized, and the dimensional precision even in the sintered body prior to polishing is improved significantly and the need for polishing work is dispensed with. |
