GB644599A - Fluorescent material - Google Patents

Fluorescent material

Info

Publication number
GB644599A
GB644599A GB21462/47A GB2146247A GB644599A GB 644599 A GB644599 A GB 644599A GB 21462/47 A GB21462/47 A GB 21462/47A GB 2146247 A GB2146247 A GB 2146247A GB 644599 A GB644599 A GB 644599A
Authority
GB
United Kingdom
Prior art keywords
potassium chloride
calcium phosphate
thallium
milled
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
GB21462/47A
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.)
GTE Sylvania Inc
Original Assignee
Sylvania Electric Products Inc
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 Sylvania Electric Products Inc filed Critical Sylvania Electric Products Inc
Publication of GB644599A publication Critical patent/GB644599A/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
    • C09K11/72—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus also containing halogen, e.g. halophosphates
    • C09K11/73—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus also containing halogen, e.g. halophosphates 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

644,599. Luminescent materials. SYLVANIA ELECTRIC PRODUCTS, Inc. Aug. 6, 1947, No. 21462. Convention date, Oct. 25, 1944. [Class 39 (i)] A luminescent material consists substantially wholly of a fired mixture of calcium phosphate and potassium chloride, actuated by thallium, the potassium chloride being between 25 and 50 per cent of the combined weight of calcium phosphate and potassium chloride. Preferably thallium sulphate, about 3 per cent of the combined weight of calcium phosphate and potassium chloride, is used in the mixture. Finely powdered tri-calcium phosphate, potassium chloride, and thallium sulphate are mixed, ball-milled in acetone, filtered, dried, and then fired for one or two hours at about 900‹ C. and then re-milled. The material may be used as coating in a fluorescent lamp, emitting radiation in the 2900 to 3100 Angstrom unit range.
GB21462/47A 1944-10-25 1947-08-06 Fluorescent material Expired GB644599A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US644599XA 1944-10-25 1944-10-25

Publications (1)

Publication Number Publication Date
GB644599A true GB644599A (en) 1950-10-11

Family

ID=22056142

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21462/47A Expired GB644599A (en) 1944-10-25 1947-08-06 Fluorescent material

Country Status (1)

Country Link
GB (1) GB644599A (en)

Cited By (1)

* 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

Cited By (1)

* 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

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