GB689683A - Improvements in and relating to luminophores - Google Patents

Improvements in and relating to luminophores

Info

Publication number
GB689683A
GB689683A GB821249A GB821249A GB689683A GB 689683 A GB689683 A GB 689683A GB 821249 A GB821249 A GB 821249A GB 821249 A GB821249 A GB 821249A GB 689683 A GB689683 A GB 689683A
Authority
GB
United Kingdom
Prior art keywords
gives
activator
metal
produced
per cent
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
GB821249A
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.)
Auralight AB
Original Assignee
Lumalampan AB
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 Lumalampan AB filed Critical Lumalampan AB
Priority to GB821249A priority Critical patent/GB689683A/en
Publication of GB689683A publication Critical patent/GB689683A/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
    • C09K11/0838—Aluminates; Silicates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Luminescent Compositions (AREA)

Abstract

689,683. Luminescent materials. LUMALAMPAN AKTIEBOLAG. March 25, 1949, No. 8212/49. Class 39(i). A luminescent material comprises a crystalline composition in accordance with the formula x Al 2 O 3 . y Me F( 2 , 3 ) together with a suitable activator, where Me denotes aluminium and/or a metal or metals from the second group of the periodic system with an atomic weight of less than 200, and the ratio x:y lies between 5:1 and 1:2 and is preferably 2 or 3: 1. The activator may be one or more of Mn, Cr, Cu, Bi, Sb, Pb or U and may vary from 0.001 up to 2 per cent in quantity. Mn gives a red emission and by the introduction of the other activators other colours can be produced. 3 Al 2 O 3 . Ca F 2 containing 0.1 per cent Mn as activator gives a red fluorescence within the range 6500-7000A when influenced by visible light, by long-wave ultra-violet light or corpuscular rays. The fluorescent materials may be produced by sintering a mixture of the desired fluoride and an aluminium compound which on being heated gives Al 2 O 3 , together with a thermally dissociable salt such as the sulphate or nitrate of the activating metal, for a period of 1-2 hours at a temperature of 1000-1400‹C. Examples using Ca. Sr and Mg as the metal Me are given. Specifications 456,325, 548,818. 548,997, 549,755 are referred to.
GB821249A 1949-03-25 1949-03-25 Improvements in and relating to luminophores Expired GB689683A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB821249A GB689683A (en) 1949-03-25 1949-03-25 Improvements in and relating to luminophores

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB821249A GB689683A (en) 1949-03-25 1949-03-25 Improvements in and relating to luminophores

Publications (1)

Publication Number Publication Date
GB689683A true GB689683A (en) 1953-04-01

Family

ID=9848042

Family Applications (1)

Application Number Title Priority Date Filing Date
GB821249A Expired GB689683A (en) 1949-03-25 1949-03-25 Improvements in and relating to luminophores

Country Status (1)

Country Link
GB (1) GB689683A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4096088A (en) * 1974-01-17 1978-06-20 Thorn Electrical Industries Limited Method of preparing cerium and terbium activated aluminate phosphors
US4382207A (en) * 1972-11-03 1983-05-03 U.S. Philips Corporation Luminescent material and discharge lamp containing the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4382207A (en) * 1972-11-03 1983-05-03 U.S. Philips Corporation Luminescent material and discharge lamp containing the same
US4096088A (en) * 1974-01-17 1978-06-20 Thorn Electrical Industries Limited Method of preparing cerium and terbium activated aluminate phosphors

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