| 摘要 |
PROBLEM TO BE SOLVED: To provide an airtight terminal the reliability of airtightness of which is enhanced by applying a compressive stress to an insulating glass in the operating temperature range, while using a low resistance metal, e.g., a copper material or an aluminum alloy material, in the lead-out lead material.SOLUTION: A compression sealing airtight terminal 10 includes a metal outer ring 11 of iron or an iron alloy, a pipe lead 12 of an iron alloy inserted into the metal outer ring 11, an insulating glass 13 for sealing the inner wall of the metal outer ring 11 and the external diameter of the pipe lead 12 airtightly, and a lead-out lead 14 composed of a low resistance metal, e.g., silver, copper, aluminum or a silver alloy, a copper alloy, or an aluminum alloy, penetrating the pipe lead 12. A predetermined gap 15 for buffering thermal expansion of the lead-out lead 14 is provided on the inside of the metal outer ring 11, and the lead-out lead 14 is bonded airtightly to the pipe lead 12 by a bonding part 16. |
