Ceramic discharge lamp hermetically sealed by brazing

摘要

A discharge lamp 100 is presented. The lamp 100 includes an arc envelope 102 defining a chamber 104 and a first opening 106. A plug 116 is positioned in the first opening 106 through a first seal 110. The lamp 100 further includes a dosing tube 134 extending away from the chamber 104, and having a passageway 136 extending into the chamber 104 through a second opening 138 in the arc envelope 102. The dosing tube 134 is coupled to the arc envelope 102 via a second seal 140. The first seal 110, the second seal 140, or both seals include a braze material having an active metal element in an amount ranging from about 0.1 weight percent to about 10 weight percent, based on the total weight of the braze material.