DE697395C - Electric discharge lamp or fluorescent tube filled with noble gases and mercury and a luminophore layer excited by the mercury radiation - Google Patents

Electric discharge lamp or fluorescent tube filled with noble gases and mercury and a luminophore layer excited by the mercury radiation

Info

Publication number
DE697395C
DE697395C DE1939P0078729 DEP0078729D DE697395C DE 697395 C DE697395 C DE 697395C DE 1939P0078729 DE1939P0078729 DE 1939P0078729 DE P0078729 D DEP0078729 D DE P0078729D DE 697395 C DE697395 C DE 697395C
Authority
DE
Germany
Prior art keywords
mercury
discharge lamp
fluorescent tube
electric discharge
luminophore
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE1939P0078729
Other languages
German (de)
Inventor
Alfred Hamilton Mckeag
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Application granted granted Critical
Publication of DE697395C publication Critical patent/DE697395C/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/70—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Luminescent Compositions (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Description

Elektrische Entladungslampe oder Leuchtröhre mit einer Füllung aus Edelgasen und Quecksilber und einer durch die Quecksilberstrahlung angeregten Luminophorschicht -Zusatz zum Patent 656 213 Gegenstand des Patents 6562r3 ist >eine elektrische Entladungslampe oder Leuchtröhre mit einer Füllung aus Edelasen und Quecksilber und einer durch die' Quecksilberstrahlung angeregten Uüminophorschicht ,aus Cadmiumphosphat, das zweckmäßig durch einen geringen Zusatz von Mangan aktiviert ist. Es wurde nun festgestellt, daß bei derartigen Entladungslampen oder Leuchtröhren ein bedeutend längeres Nachleuchten des Luminophors durch einen geringen Zusatz von Vänadium zu dem Ga:dsniumphosphaterzielt werden kann. Dieses Nachleuchten ist bei wechselstrombetriebenen Entladungslampen und Leuchtröhren besonders erwünscht, weil dadurch bekanntlich die unangenehme Erscheinung des Flimmerns unterdrückt wird. Das Nachleuchten zeigt sich besonders stark bei Anregung des Luminophors mit dem kurzwelligen Ultraviolett der Queeksilbiexniedexdruckentladung, also mit Wellenlängen zw!i.-schen 2ooo und 3ooo A. Der Anteil des dem Luminophor ragesetzten Vanadiums wird zweckmäßig nichtgrößer Aals t % gewählt, da größere Mengen die Ausbeute @an sichtbarer Lumineszenzstrahlun@g verringern. Eine Zunahme der Nachleuchtdauer kann bereits bei so geringen Vanadiumzusätzen wie o,ooi festgestellt werden. Der optimale Wert für den Vanadiumzus,atz liegt etwa in der Gegend von o,oo5 bis o,oi %.Electric discharge lamp or fluorescent tube with a filling Noble gases and mercury and a luminophore layer excited by the mercury radiation - Addendum to patent 656 213 The subject of patent 6562r3 is> an electric discharge lamp or fluorescent tube with a filling of Edelases and mercury and one through the 'mercury radiation excited uminophore layer, made of cadmium phosphate, the is appropriately activated by a small addition of manganese. It has now been established that with such discharge lamps or fluorescent tubes a significantly longer afterglow of the luminophore is achieved by adding a small amount of vanadium to the Ga: dsnium phosphate can be. This afterglow is with AC-powered discharge lamps and fluorescent tubes are particularly desirable because they are known to cause the unpleasant appearance the flicker is suppressed. The afterglow is particularly strong in Excitation of the luminophore with the short-wave ultraviolet of the Queeksilbiex low-pressure discharge, thus with wavelengths between 2ooo and 3ooo A. The proportion of the luminophore The added vanadium is expediently chosen not larger than t%, since larger amounts reduce the yield of visible luminescence radiation. An increase in the afterglow period can already be at as little vanadium additions as o, ooi found will. The optimum value for the vanadium additive is around 0.05 to o, oi%.

Die Erhöhung der Nachleuchtdauer zeigä sich in besonders hohem Maße, wenn dein.-Cadmiumphosphat ,außer dein geringen Zusatz von Vanadium noch zur Verbesserung der Lichtausbeute Cadmumchloridoder Magnesiumchlorid zugesetzt ist. Der Vanadiumzusatz erfolgt zweckmäßig in Form von Vanadnumpentoxyd. Das Gemisch wird in gleicher Weise ,getrocknet und geglüht, wie im Patent 656213 beschrieben. Der Luminophor läßt sich dann in derselben Weise, wie im genannten Patent für Cadmiumphosphat angegeben, besonders gut unter Benutzung einer Phosphorsäureschicht auf der Gefäßwandung von Entladungslampen oder Leuchtröhren bzw. auf denselben zugeordneten Schirmen anbringen.The increase in the afterglow period is particularly evident, if thy.-cadmium phosphate, in addition to your small addition of vanadium, for improvement Cadmum chloride or magnesium chloride is added to the light output. The vanadium addition takes place appropriately in the form of Vanadnumpentoxyd. The mixture is made in the same way , dried and calcined as described in patent 656213. The luminophore can then in the same way as stated in the said patent for cadmium phosphate, particularly well using a phosphoric acid layer on the vessel wall of Attach discharge lamps or fluorescent tubes or on the screens assigned to them.

Claims (1)

PATENTANSPRÜCIIE: i. Elektrische Entladungslampe oder -Leuchtröhre mit einer Füllung aus Edelgasen und Quecksilber und @ein.er durch Quecksilberstrahlung angeregten Lumiophorschicht nach Patent 656 213, dadurch gekennzeichnet, daß .dem zur Hürstellung der Luminophorschicht verwendeten Gadmiumphosphat noch Vanadium, z: B. in Form von Vanadiumpentoxyd, zugesetzt ist, und zwar zweckmäßig in einer Menge von 0,005 bis o,oi %. z. Entladungslampe oder Leuchtröhre nach Anspruch i, dadurch gekennzeichnet, daß dem Luminophor noch Cadmiumchlorid zugesetzt ist. 3. Entladungslampe oder Leuchtröhre nach Anspruch i, dadurch gekennzeichnet, daß dem Luminophor noch Magnesium-Chlorid zugesetzt ist.PATENT CLAIM: i. Electric discharge lamp or fluorescent tube with a filling of noble gases and mercury and @ ein.er Lumiophore layer excited by mercury radiation according to Patent 656 213, characterized in that the gadmium phosphate used to produce the luminophore layer also contains vanadium, e.g. in the form of vanadium pentoxide, is added, expediently in an amount of 0.005 to oi%. z. Discharge lamp or fluorescent tube according to Claim i, characterized in that cadmium chloride is also added to the luminophore. 3. Discharge lamp or fluorescent tube according to claim i, characterized in that magnesium chloride is added to the luminophore.
DE1939P0078729 1938-03-16 1939-02-24 Electric discharge lamp or fluorescent tube filled with noble gases and mercury and a luminophore layer excited by the mercury radiation Expired DE697395C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB697395X 1938-03-16

Publications (1)

Publication Number Publication Date
DE697395C true DE697395C (en) 1940-10-12

Family

ID=10493520

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1939P0078729 Expired DE697395C (en) 1938-03-16 1939-02-24 Electric discharge lamp or fluorescent tube filled with noble gases and mercury and a luminophore layer excited by the mercury radiation

Country Status (1)

Country Link
DE (1) DE697395C (en)

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