Low-pressure mercury vapor discharge lamp

A low-pressure mercury vapor discharge lamp ( 1 ) has a discharge vessel ( 3 ) enclosing, in a gastight manner, a discharge space provided with a filling of mercury and a rare gas. The discharge vessel ( 3 ) comprises means for maintaining an electric discharge in the discharge space. A portion of t...

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Main Authors STAATS CORNELIA T, SNIJKERS-HENDRICKX INGRID J.M, GEERDINCK LEONIE M, VOSSEN ENGELBERTUS CORNELIUS P.M, DE BEER ESTHER
Format Patent
LanguageEnglish
Published 18.05.2006
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
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Abstract A low-pressure mercury vapor discharge lamp ( 1 ) has a discharge vessel ( 3 ) enclosing, in a gastight manner, a discharge space provided with a filling of mercury and a rare gas. The discharge vessel ( 3 ) comprises means for maintaining an electric discharge in the discharge space. A portion of the surface ( 15 ) of the discharge vessel ( 3 ) facing the discharge space is provided with a protective layer ( 16 ) comprising yttrium oxide or aluminum oxide and further comprises a borate and/or a phosphate of an alkaline earth metal and/or of scandium, yttrium, or a further rare earth metal. Preferably, the alkaline earth metal is calcium, strontium, and/or barium. Preferably, the further rare earth metal is lanthanum, cerium, and/or gadolinium. The lamp according to the invention has a comparatively low mercury consumption.
AbstractList A low-pressure mercury vapor discharge lamp ( 1 ) has a discharge vessel ( 3 ) enclosing, in a gastight manner, a discharge space provided with a filling of mercury and a rare gas. The discharge vessel ( 3 ) comprises means for maintaining an electric discharge in the discharge space. A portion of the surface ( 15 ) of the discharge vessel ( 3 ) facing the discharge space is provided with a protective layer ( 16 ) comprising yttrium oxide or aluminum oxide and further comprises a borate and/or a phosphate of an alkaline earth metal and/or of scandium, yttrium, or a further rare earth metal. Preferably, the alkaline earth metal is calcium, strontium, and/or barium. Preferably, the further rare earth metal is lanthanum, cerium, and/or gadolinium. The lamp according to the invention has a comparatively low mercury consumption.
Author DE BEER ESTHER
STAATS CORNELIA T
GEERDINCK LEONIE M
VOSSEN ENGELBERTUS CORNELIUS P.M
SNIJKERS-HENDRICKX INGRID J.M
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Snippet A low-pressure mercury vapor discharge lamp ( 1 ) has a discharge vessel ( 3 ) enclosing, in a gastight manner, a discharge space provided with a filling of...
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SubjectTerms BASIC ELECTRIC ELEMENTS
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
Title Low-pressure mercury vapor discharge lamp
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