Electric lamp.

摘要

The electric lamp has a quartz glass lamp vessel (1) in the wall (2) of which current lead-through conductors (3) are accommodated which comprise a molybdenum foil (5) to a first end portion (5') of which a molybdenum outer current conductor (6) is connected. A capillary space extends around the outer conductor (6) from an end face of a seal (8), in which space the first end portion (5') projects. The outer current conductor (6) has a coating of platinum and a skin (9) of platinum phosphide, the first end portion (5') has a skin (9') of molybdenum phosphide and the capillary space is closed by a borate glass (10). The skins and the borate glass enable to operate the lamp in a surrounding of a relatively high temperature without affecting the life of the lamp, which would otherwise occur as a result of oxidation. <IMAGE>