| 摘要 |
<p>An electric lamp comprising a lamp vessel (1) which is sealed in a gastight manner to a sleeve (9) by means of a sealing glass (12). The sealing glass (12) comprises, as calculated in % by weight on an oxide basis: 33-70% SiO2, 10-35% A12O3, 0-10% B2O3, 33-70% Si02 + B2O3, 10-35% A12O3 + B2O3, 0-10% P2O5 and finally a 10-40% copperoxide as an infrared absorbing material. The sealing glass (12) has favorable properties which improve the lamp properties, as regards the annealing and softening points of the sealing glass (12) and suppression of a tendency of the sealing glass to devitrify. The risk of devitrification and deterioration of the gastight seal between glass bodies (1, 9) and an untimely failure of the lamp is thus counteracted.</p> |
