GB577693A - Improvements in and relating to fluorescent materials - Google Patents

Improvements in and relating to fluorescent materials

Info

Publication number
GB577693A
GB577693A GB9995/44A GB999544A GB577693A GB 577693 A GB577693 A GB 577693A GB 9995/44 A GB9995/44 A GB 9995/44A GB 999544 A GB999544 A GB 999544A GB 577693 A GB577693 A GB 577693A
Authority
GB
United Kingdom
Prior art keywords
calcium
thallium
sulphate
relating
fluorescent materials
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
GB9995/44A
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 GB577693A publication Critical patent/GB577693A/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
    • C09K11/70—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus
    • C09K11/71—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus also containing alkaline earth metals

Landscapes

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

Abstract

577,693. Luminescent materials. BRITISH THOMSON-HOUSTON CO., Ltd. May 24, 1944, No. 9995. Convention date, May 28, 1943. Drawings to Specification. [Class 39 (i)] Luminescent material comprises an alkaline earth metal phosphate activated with thallium. In its preparation calcium nitrate, ammonium phosphate and thallous hydroxide are mixed and heated together, producing calcium phosphate activated with thallium. A sulphate such as ammonium sulphate should also be present to neutralize any excess calcium oxide that may be formed. Excess calcium oxide in the batch ingredients is desirable to ensure the formation of calcium orthophosphate.
GB9995/44A 1943-05-28 1944-05-24 Improvements in and relating to fluorescent materials Expired GB577693A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US577693XA 1943-05-28 1943-05-28

Publications (1)

Publication Number Publication Date
GB577693A true GB577693A (en) 1946-05-28

Family

ID=22012642

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9995/44A Expired GB577693A (en) 1943-05-28 1944-05-24 Improvements in and relating to fluorescent materials

Country Status (1)

Country Link
GB (1) GB577693A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2563900A (en) * 1947-06-21 1951-08-14 Westinghouse Electric Corp Phosphor and method of making
US2664401A (en) * 1949-04-01 1953-12-29 Gen Electric Alkaline earth phosphate phosphors of the apatite type

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2563900A (en) * 1947-06-21 1951-08-14 Westinghouse Electric Corp Phosphor and method of making
US2664401A (en) * 1949-04-01 1953-12-29 Gen Electric Alkaline earth phosphate phosphors of the apatite type

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