DEVICE PROVIDED WITH AN EVACUATED BULB COMPRISING A GETTER AND A GETTER AUXILIARY MEANS

摘要

12ABSTRACT:Device provided with an evacuated bulb comprising a getterand a getter auxiliary means.In devices provided with an evacuated bulbin which is present an activated metallic getter, hydro-carbons can be released or produced. As a result, the gaspressure and the heat conductivity increase. In devicesaccording to the invention, for example, low-pressuresodium vapour discharge lamps, solar collectors, displaytubes and image intensifiers, a getter auxiliary means isprovided. The auxiliary means comprises an inorganic porouscarrier charged with a transition metal having an atomicnumber from the series 23 to 29, 41 to 47 and 73 to 79, inelementary form or in oxide form, or with a combination ofat least two of the said materials.Fig. 4.