公开(公告)号：EP0583122A1

公开(公告)日：1994-02-16

申请号：EP93306082.4

申请日：1993-08-02

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Russell, Timothy David ,  Datta, Ranajit Kumar ,  Mathews, Paul George ,  Scott, Curtin Edward ,  Kaliszewski, Mary Sue ,  Stewart, Charles Ner

IPC: H01J61/35

CPC classification number: C04B41/5024 ,  C03C17/02 ,  H01J61/35 ,  H01J61/827

Abstract: An arc tube (14) of fused silica for a metal halide arc discharge lamp including a fill for the arc tube comprised of a sodium halide, at least one additional metal halide, and an inert starting gas, the arc tube (14) including a tube of fused silica having an inner wall defining an arc chamber, the inner wall of the tube having provided thereon a metal silicate coating (14a) which is vitreous and light-transmissive, and which is comprised of a silicate of at least one metal selected from the group consisting essentially of scandium, yttrium, and a rare earth element, and preferably which is the same metal as that of the at least one additional metal halide. Protection of the fused silica arc tube (14) with the metal silicate coating reduces loss of the metallic portion of the fill by diffusion or reaction and corresponding buildup of free halogen in the arc tube (14).

Abstract translation: 一种用于金属卤化物电弧放电灯的熔融二氧化硅的电弧管（14），包括由卤化钠，至少一种另外的金属卤化物和惰性起始气体构成的电弧管的填充物，所述电弧管（14）包括 所述熔融石英管具有限定电弧室的内壁，所述管的内壁上设置有玻璃质和透光性的金属硅酸盐涂层（14a），所述金属硅酸盐涂层（14a）由至少一种选自金属的硅酸盐 从基本上由钪，钇和稀土元素组成的组中，优选与至少一种另外的金属卤化物相同的金属。 用金属硅酸盐涂层保护熔融二氧化硅发光管（14）通过扩散或反应减少了填充物的金属部分的损失，并且在电弧管（14）中相应地形成了游离卤素。