GB672518A - Improvements in and relating to calcium silicate phosphors and methods of preparing the same - Google Patents

Improvements in and relating to calcium silicate phosphors and methods of preparing the same

Info

Publication number
GB672518A
GB672518A GB19197/50A GB1919750A GB672518A GB 672518 A GB672518 A GB 672518A GB 19197/50 A GB19197/50 A GB 19197/50A GB 1919750 A GB1919750 A GB 1919750A GB 672518 A GB672518 A GB 672518A
Authority
GB
United Kingdom
Prior art keywords
firing
calcium silicate
relating
preparing
methods
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
GB19197/50A
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
Priority to GB19197/50A priority Critical patent/GB672518A/en
Publication of GB672518A publication Critical patent/GB672518A/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
    • C09K11/66—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing germanium, tin or lead
    • C09K11/666—Aluminates; Silicates

Landscapes

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

Abstract

672,518. Luminescent materials. BRITISH THOMSON-HOUSTON CO., Ltd. Aug. 1, 1950 [Aug. 15, 1949]; No. 19197/50. Class 39 (i). A fluorescent composition of manganese and lead-activated calcium silicate is prepared by mixing compounds of calcium and silicon, which upon heating react to form calcium silicate, with activating proportions of manganese and lead compounds and firing the mixture at a temperature of approximately 1000-1200‹ C. with additions of a catalyst consisting of both a fluoride and a chloride of the group consisting of fluorides and chlorides of calcium and ammonium. Single or double firing may be employed. In the case of the latter a fluoride may be added before the first firing and a chloride added before the second firing. Specific examples are given. Specification 577,694 is referred to.
GB19197/50A 1950-08-01 1950-08-01 Improvements in and relating to calcium silicate phosphors and methods of preparing the same Expired GB672518A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB19197/50A GB672518A (en) 1950-08-01 1950-08-01 Improvements in and relating to calcium silicate phosphors and methods of preparing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB19197/50A GB672518A (en) 1950-08-01 1950-08-01 Improvements in and relating to calcium silicate phosphors and methods of preparing the same

Publications (1)

Publication Number Publication Date
GB672518A true GB672518A (en) 1952-05-21

Family

ID=22074753

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19197/50A Expired GB672518A (en) 1950-08-01 1950-08-01 Improvements in and relating to calcium silicate phosphors and methods of preparing the same

Country Status (1)

Country Link
GB (1) GB672518A (en)

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