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    • 3. 发明授权
    • Low-pressure mercury vapor discharge lamp
    • 低压汞蒸气放电灯
    • US06417614B1
    • 2002-07-09
    • US09561612
    • 2000-04-27
    • Cornelis Reinder RondaCornelis Johannes Maria DenissenVolker Ulrich Weiler
    • Cornelis Reinder RondaCornelis Johannes Maria DenissenVolker Ulrich Weiler
    • H01J162
    • H01J61/42C09K11/025C09K11/08H01J61/44H01J61/46
    • A low-pressure mercury vapor discharge lamp comprises a discharge vessel (10) having a tubular portion (11). The discharge vessel (10) encloses a discharge space (13) provided with a filling of mercury and a rare gas in a gastight manner. The tubular portion (13) of the discharge vessel (10) is provided with a metal oxide layer (15) and a luminescent layer (17) on a surface (14) facing the discharge space (13). The discharge lamp comprises means for maintaining an electric discharge in the discharge vessel (20b). The discharge lamp is characterized in that the luminescent layer (17) comprises an alkali metal oxide. This alkali metal oxide is preferably sodium oxide and/or potassium oxide, and the concentration of the alkali metal oxide is 0.002≦Na2O≦0.1% by weight and/or 0.002≦K2O ≦0.1% by weight. The tubular portion (11) of the discharge vessel (10) preferably has a further metal oxide layer which acts as an alkali metal-repellent layer. This further metal oxide layer preferably comprises silicon oxide. The lamp according to the invention has a comparatively low mercury consumption.
    • 低压汞蒸汽放电灯包括具有管状部分(11)的放电容器(10)。 放电容器(10)以气密的方式包围设置有汞和稀有气体的填充物的放电空间(13)。 放电容器(10)的管状部分(13)在与放电空间(13)相对的表面(14)上设置有金属氧化物层(15)和发光层(17)。 放电灯包括用于保持放电容器(20b)中的放电的装置。 放电灯的特征在于发光层(17)包含碱金属氧化物。 该碱金属氧化物优选为氧化钠和/或氧化钾,碱金属氧化物的浓度为0.002 <= Na 2 O = 0.1重量%和/或0.002 <= K 2 O = 0.1重量%。 放电容器(10)的管状部分(11)优选具有作为碱金属驱避层的另外的金属氧化物层。 该另外的金属氧化物层优选包含氧化硅。 根据本发明的灯具有相对较低的汞消耗。