3 mass the discharge lamp which possesses the electrode which is produced from the tungsten alloy which includes a less rhenium

摘要

This invention the discharge room which possesses the gas shell filler the electrode which is arranged in (4) and the said discharge room the high pressure gas discharge lamp which (5) is included regards (1). The aforementioned electrode one is the tungsten alloy electrode at least, the said alloy (a) the super high purity tungsten, and (b) 0.01 - 3 mass of the quantity of the tungsten % in the quantity here, rhenium, osmium, tantalum, hafnium, iridium and zirconium it is produced at least from one. The tungsten alloy of this invention allowance of processing of the electrode and sufficiently is high in order to obtain the ductility which is sufficient for the decreasing the black change of the electrode between durable years service lives of the lamp and is sufficiently low in order to decrease the rhenium evaporation which is the cause of black change during operation of the lamp and inside the discharge room, appropriate balance between rhenium or osmium content is arranged. This invention furthermore regards the production method of the said lamp. Selective figure Figure 3B