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GB9220762D0 - Flourescent powder for low pressure mercury vapour discharge - Google Patents

Flourescent powder for low pressure mercury vapour discharge

Info

Publication number
GB9220762D0
GB9220762D0 GB929220762A GB9220762A GB9220762D0 GB 9220762 D0 GB9220762 D0 GB 9220762D0 GB 929220762 A GB929220762 A GB 929220762A GB 9220762 A GB9220762 A GB 9220762A GB 9220762 D0 GB9220762 D0 GB 9220762D0
Authority
GB
United Kingdom
Prior art keywords
barium
low pressure
pressure mercury
lamp
mercury vapour
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.)
Withdrawn
Application number
GB929220762A
Other versions
GB2271117A (en
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.)
Mass Technology HK Ltd
Original Assignee
Mass Technology HK Ltd
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 Mass Technology HK Ltd filed Critical Mass Technology HK Ltd
Priority to GB9220762A priority Critical patent/GB2271117A/en
Priority to FI925119A priority patent/FI925119L/en
Publication of GB9220762D0 publication Critical patent/GB9220762D0/en
Publication of GB2271117A publication Critical patent/GB2271117A/en
Withdrawn legal-status Critical Current

Links

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
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
    • C09K11/7774—Aluminates
    • 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
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7706—Aluminates
    • 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
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7715—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing cerium
    • C09K11/7721—Aluminates
    • 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
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
    • C09K11/7734—Aluminates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/067—Main electrodes for low-pressure discharge lamps
    • H01J61/0675—Main electrodes for low-pressure discharge lamps characterised by the material of the electrode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/34—Double-wall vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
    • H01J61/545—Igniting arrangements, e.g. promoting ionisation for starting using an auxiliary electrode inside the vessel
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/56—One or more circuit elements structurally associated with the lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
    • H01J61/72—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury

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)

Abstract

Low pressure mercury vapour lamp has a rod-form starting electrode close to one of the main electrodes to reduce the starting voltage. The electrodes are of aluminium or nickel or nickel coated metal, and have surface coating of barium or strontium or calcium oxide. The discharge tube is mounted within an external envelope having the external form of a conventional incandescent lamp, and likewise the screw or push-fit connection means thereof. A ballast resistor for the lamp is located within the screw of push-fit connector. A fluorescent coating on the inner envelope comprises rare-earth elements and converts the ultra-violet frequencies to visible wavelengths. A fluorescent powder which produces visible radiation in the green wavelength may be represented as (Ce2Tb)BMg3Al40O64, formulated from a composition having the weight percent constituents: basic magnesium carbonate (5 - 15), cerium oxide (5 - 15), activated carbon (1 - 3), boric acid (0.1 - 0.3) and alumina (the balance to 100). A fluorescent powder which produces a corresponding blue-coloured radiation may be represented as Ba2MgBAl20FO34Eu4, formulated from a composition having the weight percent constituents: europium oxide (1.2 - 3.5), barium carbonate (8.8 - 26.3), barium fluoride (0.8 - 2.5), basic magnesium carbonate (5.3 - 15.9), boric acid (0.1 - 0.3), activated carbon (0.3 - 1.1) and alumina (the balance to 100).
GB9220762A 1992-10-02 1992-10-02 Low pressure mercury vapour lamp and luminescent materials therefor Withdrawn GB2271117A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9220762A GB2271117A (en) 1992-10-02 1992-10-02 Low pressure mercury vapour lamp and luminescent materials therefor
FI925119A FI925119L (en) 1992-10-02 1992-11-11 Fluorescerande Pulver Foer kvicksilverurladdningslampor med laogtryck

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9220762A GB2271117A (en) 1992-10-02 1992-10-02 Low pressure mercury vapour lamp and luminescent materials therefor

Publications (2)

Publication Number Publication Date
GB9220762D0 true GB9220762D0 (en) 1992-11-18
GB2271117A GB2271117A (en) 1994-04-06

Family

ID=10722859

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9220762A Withdrawn GB2271117A (en) 1992-10-02 1992-10-02 Low pressure mercury vapour lamp and luminescent materials therefor

Country Status (2)

Country Link
FI (1) FI925119L (en)
GB (1) GB2271117A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29511173U1 (en) * 1994-07-30 1995-09-14 Schiller, Christa, 90429 Nürnberg Compact fluorescent lamp with incandescent lamp base, especially with base thread type E 27 or E 14
US5834899A (en) * 1996-10-16 1998-11-10 Tapeswitch Corporation Of America Fluorescent apparatus and method employing low-frequency excitation into a conductive-resistive inductive medium
JP2002175780A (en) * 2000-09-28 2002-06-21 Toshiba Lighting & Technology Corp High pressure discharge lamp, high pressure discharge lamp lighting device and lighting device
MY131962A (en) 2001-01-24 2007-09-28 Nichia Corp Light emitting diode, optical semiconductor device, epoxy resin composition suited for optical semiconductor device, and method for manufacturing the same
FR2993393B1 (en) 2012-07-11 2016-01-15 Centre Nat Rech Scient LUMINESCENT DISCHARGE LAMP

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7400223A (en) * 1974-01-08 1975-07-10 Philips Nv LOW-PRESSURE MERCURY DISCHARGE LAMP.
US4258285A (en) * 1979-06-22 1981-03-24 Gte Products Corporation Two-component phosphor in a cool white lamp
US4847533A (en) * 1986-02-05 1989-07-11 General Electric Company Low pressure mercury discharge fluorescent lamp utilizing multilayer phosphor combination for white color illumination

Also Published As

Publication number Publication date
FI925119A0 (en) 1992-11-11
GB2271117A (en) 1994-04-06
FI925119A7 (en) 1994-04-03
FI925119L (en) 1994-04-03

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)