| 摘要 |
PROBLEM TO BE SOLVED: To suppress the scatter in an early period of an emitter supported in an electrode coil surface, and maintain high ultraviolet luminance over a long period in a high-pressure discharge lamp in which a metal additive and an inert gas are sealed inside a silica glass light-emitting tube, an electrode having tungsten as the body at both ends of the light-emitting tube is sealed and adhered, and an electrode part becomes high temperature when lighted. SOLUTION: The electrode is constituted of an electrode core rod and an electrode coil by having tungsten as the body. An electron emission material (emitter) is coated on the electrode coil by a binary compound oxide which is constituted of yttrium oxide and aluminum oxide, and in which molar percentage of yttrium oxide to the whole is 60% or more and 90% or less. COPYRIGHT: (C)2010,JPO&INPIT |
