GB550744A - Improvements in and relating to fluorescent materials - Google Patents

Improvements in and relating to fluorescent materials

Info

Publication number
GB550744A
GB550744A GB484/42A GB48442A GB550744A GB 550744 A GB550744 A GB 550744A GB 484/42 A GB484/42 A GB 484/42A GB 48442 A GB48442 A GB 48442A GB 550744 A GB550744 A GB 550744A
Authority
GB
United Kingdom
Prior art keywords
cerium
phosphate
jan
hydrogen
oxide
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
GB484/42A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB550744A publication Critical patent/GB550744A/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
    • C09K11/77—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
    • C09K11/7723—Phosphates
    • C09K11/7724—Phosphates with alkaline earth metals

Landscapes

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

Abstract

550,744. Luminescent materials. BRITISH THOMSON-HOUSTON CO., Ltd. Jan. 13, 1942, No. 484. Convention date, Jan. 16, 1941. [Class 39 (i)] In a mercury vapour lamp used in blue-printing a luminescent material is used consisting of. cerium activated calcium phosphate which will emit in the range 3200-4000A‹. The phosphate may be formed from calcium nitrate or chloride and ammonium phosphate ; cerium is added in the form of oxide, nitrate, sulphate or any compound which breaks down to the oxide on heating; and is between 2 to 20 per cent by weight of the phosphate. aThe mixture of calcium phosphate and cerium compound is fixed in hydrogen at a temperature between 950-1100‹C; fixing may be first in air and then in hydrogen. Tables giving relative brightness values depending on percentage of cerium are set out in. the description.
GB484/42A 1941-01-16 1942-01-13 Improvements in and relating to fluorescent materials Expired GB550744A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US550744XA 1941-01-16 1941-01-16

Publications (1)

Publication Number Publication Date
GB550744A true GB550744A (en) 1943-01-21

Family

ID=21995412

Family Applications (1)

Application Number Title Priority Date Filing Date
GB484/42A Expired GB550744A (en) 1941-01-16 1942-01-13 Improvements in and relating to fluorescent materials

Country Status (1)

Country Link
GB (1) GB550744A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1150774B (en) * 1955-07-22 1963-06-27 Thorn Electrical Ind Ltd Alkaline earth phosphate phosphor
RU2779453C1 (en) * 2021-12-10 2022-09-07 Федеральное государственное бюджетное учреждение науки "Институт металлургии и материаловедения им. А.А. Байкова Российской академии наук (ИМЕТ РАН)" Method for producing luminescent calcium orthophosphate activated by cerium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1150774B (en) * 1955-07-22 1963-06-27 Thorn Electrical Ind Ltd Alkaline earth phosphate phosphor
RU2779453C1 (en) * 2021-12-10 2022-09-07 Федеральное государственное бюджетное учреждение науки "Институт металлургии и материаловедения им. А.А. Байкова Российской академии наук (ИМЕТ РАН)" Method for producing luminescent calcium orthophosphate activated by cerium

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