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    • 77. 发明授权
    • Monolithic seal for a sapphire metal halide lamp
    • 蓝宝石金属卤化物灯的单片密封
    • US06955579B2
    • 2005-10-18
    • US10805372
    • 2004-03-19
    • Arlene HeckerGeorge C. WeiHelmar G. AdlerDieter Lang
    • Arlene HeckerGeorge C. WeiHelmar G. AdlerDieter Lang
    • H01J61/18C04B35/10H01J9/24H01J9/26H01J61/30H01J61/36H01J9/00
    • H01J9/266H01J9/247H01J61/302H01J61/363
    • A method of producing a ceramic metal halide discharge lamp having a monolithic seal between a sapphire (single crystal alumina) arc tube and a polycrystalline alumina (PCA) end cap. The method includes the steps of providing an arc tube of fully dense sapphire and providing an end cap made of unsintered compressed polycrystalline alumina powder doped with magnesium oxide and yttrium oxide. The end cap is heated until it is presintered to remove organic binder material at a low temperature relative to the sintering temperature. The presintered end cap is placed on an end portion of the arc tube to form a close interface between the two. The presintered end cap and adjacent arc tube are then heated to until the end cap is fully sintered onto the arc tube and the sapphire tube grows into the end cap. A monolithic seal is formed along the interface between the end cap and the arc tube as the sapphire tube grows into the polycrystalline alumina end cap. The yttrium oxide promotes increased growth between sapphire tube and the PCA end cap and is not detrimental to the metal halide chemistry, nor subject to erosion by the metal halide chemistry.
    • 一种在蓝宝石(单晶氧化铝)电弧管和多晶氧化铝(PCA)端盖之间具有整体式密封的陶瓷金属卤化物放电灯的制造方法。 该方法包括提供完全致密的蓝宝石的电弧管并提供由掺杂有氧化镁和氧化钇的未烧结压缩多晶氧化铝粉末制成的端盖的步骤。 将端盖加热至预烧结,以相对于烧结温度在低温下除去有机粘合剂材料。 预烧结端盖放置在电弧管的端部上,以在两者之间形成紧密的界面。 然后将预烧结端盖和相邻的电弧管加热直到端盖完全烧结到电弧管上,并且蓝宝石管生长到端盖中。 当蓝宝石管生长成多晶氧化铝端盖时,沿着端盖和电弧管之间的界面形成整体密封。 氧化钇促进蓝宝石管和PCA端盖之间的增长,并且不会对金属卤化物化学产生不利影响,也不会被金属卤化物化学物质侵蚀。