| 摘要 |
PURPOSE:To effectively obtain a high bondability by inserting a sealing member into the lead inserting hole of a stem made of iron containing the prescribed content of C. CONSTITUTION:A stem body 2 contains 0.05-0.15wt% of C and the residue of Fe. Soft or hard glass sealing memeber 4, to which a lead 5 made of Fe-Ni alloy is inserted, is inserted to the through hole 3. When heat treated at a temperature not lower than 600 deg.C, the member 4 is bonded to the stem body 2 at approx. 500 deg.C and solidified. When the member is lowered to ambient temperature, the stem body is largely shrinked more than the sealing member, the compression stress is absobed by the elastic deformation, and both are effectively rigidly bonded. |
