GB564700A - Improvements in and relating to phosphors - Google Patents

Improvements in and relating to phosphors

Info

Publication number
GB564700A
GB564700A GB18115/42A GB1811542A GB564700A GB 564700 A GB564700 A GB 564700A GB 18115/42 A GB18115/42 A GB 18115/42A GB 1811542 A GB1811542 A GB 1811542A GB 564700 A GB564700 A GB 564700A
Authority
GB
United Kingdom
Prior art keywords
fired
dec
silica
phosphors
relating
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
GB18115/42A
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 GB564700A publication Critical patent/GB564700A/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
    • C09K11/67—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing refractory metals
    • C09K11/68—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing refractory metals containing chromium, molybdenum or tungsten

Landscapes

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

Abstract

564,700. Luminescent materials. BRITISH THOMSON-HOUSTON CO., Ltd. Dec. 21, 1942, No. 18115. Convention 'date, Dec. 31, 1941. [Class 39 (i)] A phosphor containing a tungstate or a molybdate is fired with silica or a boron compound to eliminate or transform impurities which would otherwise impair the fluorescence. For example, 900 grams of tungsten trioxide, 240 of calcium oxide, and 20.8 of lead acetate may be mixed in a ball mill, dried at about 200‹C and then fired at 950 to 1100‹ C. About 5 per cent of silicic acid may then be added and the mixture fired at about the same temperature as before.. Boric acid may be used instead of silica.
GB18115/42A 1941-12-31 1942-12-21 Improvements in and relating to phosphors Expired GB564700A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US564700XA 1941-12-31 1941-12-31

Publications (1)

Publication Number Publication Date
GB564700A true GB564700A (en) 1944-10-10

Family

ID=22004612

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18115/42A Expired GB564700A (en) 1941-12-31 1942-12-21 Improvements in and relating to phosphors

Country Status (1)

Country Link
GB (1) GB564700A (en)

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