GB673637A - Improvements relating to fluorescent materials - Google Patents

Improvements relating to fluorescent materials

Info

Publication number
GB673637A
GB673637A GB10102/48A GB1010248A GB673637A GB 673637 A GB673637 A GB 673637A GB 10102/48 A GB10102/48 A GB 10102/48A GB 1010248 A GB1010248 A GB 1010248A GB 673637 A GB673637 A GB 673637A
Authority
GB
United Kingdom
Prior art keywords
powder activated
calcium halophosphate
give
colour
halophosphate powder
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
GB10102/48A
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.)
Siemens Electric Lamps and Supplies Ltd
Original Assignee
Siemens Electric Lamps and Supplies 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 Siemens Electric Lamps and Supplies Ltd filed Critical Siemens Electric Lamps and Supplies Ltd
Priority to GB10102/48A priority Critical patent/GB673637A/en
Publication of GB673637A publication Critical patent/GB673637A/en
Expired 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
    • C09K11/74—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing arsenic, antimony or bismuth
    • C09K11/75—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing arsenic, antimony or bismuth containing antimony
    • C09K11/76—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing arsenic, antimony or bismuth containing antimony also containing phosphorus and halogen, e.g. halophosphates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

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

673,637. Luminescent materials. SIEMENS ELECTRIC LAMPS & SUPPLIES, Ltd., ALDINGTON, J. N., and HARRISON, W. April 12, 1949 [April 12, 1948], No. 10102/48. Drawings to Specification. Class 39 (i). A fluorescent material capable of being excited by the radiation in a low-pressure mercury vapour electric discharge lamp to give a " near white " light comprises a calcium halophosphate powder activated to produce blue fluorescence mixed with a calcium halophosphate powder activated to produce a warm white fluorescence, the proportions of the two powders being such that the colour of the light emitted by the mixture lies on or closely adjacent to that part of the straight line joining the points x=0.229, y=0.271 and x=0.430, y=0.377 which lies between the points x=0.296, y=0.306, corresponding to a temperature of about 7500‹ K., and x=0.430, y=0.377 on the standard chromaticity chart. These two powders are described in Specification 592,675 referred to. In examples described, 100 parts by weight of calcium halophosphate powder activated by antimony with the addition of 2 per cent manganese to give a warm white colour are mixed with 25, 40 or 120 parts by weight of calcium halophosphate powder activated by antimony to give a blue colour. The fluorescent material can be coated internally on the envelope of a low-pressure mercury vapour electric discharge lamp.
GB10102/48A 1948-04-12 1948-04-12 Improvements relating to fluorescent materials Expired GB673637A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB10102/48A GB673637A (en) 1948-04-12 1948-04-12 Improvements relating to fluorescent materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB10102/48A GB673637A (en) 1948-04-12 1948-04-12 Improvements relating to fluorescent materials

Publications (1)

Publication Number Publication Date
GB673637A true GB673637A (en) 1952-06-11

Family

ID=9961533

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10102/48A Expired GB673637A (en) 1948-04-12 1948-04-12 Improvements relating to fluorescent materials

Country Status (1)

Country Link
GB (1) GB673637A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2999070A (en) * 1954-03-01 1961-09-05 Westinghouse Electric Corp Blue halophosphate phosphor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2999070A (en) * 1954-03-01 1961-09-05 Westinghouse Electric Corp Blue halophosphate phosphor

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