GB577694A - Improvements in and relating to luminescent materials - Google Patents

Improvements in and relating to luminescent materials

Info

Publication number
GB577694A
GB577694A GB9996/44A GB999644A GB577694A GB 577694 A GB577694 A GB 577694A GB 9996/44 A GB9996/44 A GB 9996/44A GB 999644 A GB999644 A GB 999644A GB 577694 A GB577694 A GB 577694A
Authority
GB
United Kingdom
Prior art keywords
luminescent materials
reaction
manganese
relating
lead
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
GB9996/44A
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 GB577694A publication Critical patent/GB577694A/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

577,694. Luminescent materials. BRITISH THOMSON-HOUSTON CO., Ltd. May 24, 1944, No. 9996. Convention date, May 29, 1943. Drawings to Specification. [Class 39 (i)] Luminescent material comprises a matrix of alkaline earth metal silicate co-operatively activated with manganese and lead. The material may be made by heating a mixture of calcium carbonate, silica, lead oxide and manganese carbonate. This reaction should take place in the presence of steam at a temperature between 1000‹ to 1250‹ C. Firing in air is possible, but it takes longer to complete the reaction and a product of inferior brightness is produced.
GB9996/44A 1943-05-29 1944-05-24 Improvements in and relating to luminescent materials Expired GB577694A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US577694XA 1943-05-29 1943-05-29

Publications (1)

Publication Number Publication Date
GB577694A true GB577694A (en) 1946-05-28

Family

ID=22012643

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9996/44A Expired GB577694A (en) 1943-05-29 1944-05-24 Improvements in and relating to luminescent materials

Country Status (1)

Country Link
GB (1) GB577694A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2719128A (en) * 1950-06-21 1955-09-27 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Luminescent material
DE1076290B (en) * 1955-05-10 1960-02-25 Philips Nv Process for producing an ultraviolet luminous silicate
DE1278648B (en) * 1954-06-02 1968-09-26 Philips Nv Process for the production of a silicate emitting in the erythema area

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2719128A (en) * 1950-06-21 1955-09-27 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Luminescent material
DE1278648B (en) * 1954-06-02 1968-09-26 Philips Nv Process for the production of a silicate emitting in the erythema area
DE1076290B (en) * 1955-05-10 1960-02-25 Philips Nv Process for producing an ultraviolet luminous silicate

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