GB574321A - Improvements in and relating to luminescent materials or phosphors of the alkaline earth metal sulphide type - Google Patents

Improvements in and relating to luminescent materials or phosphors of the alkaline earth metal sulphide type

Info

Publication number
GB574321A
GB574321A GB1042541A GB1042541A GB574321A GB 574321 A GB574321 A GB 574321A GB 1042541 A GB1042541 A GB 1042541A GB 1042541 A GB1042541 A GB 1042541A GB 574321 A GB574321 A GB 574321A
Authority
GB
United Kingdom
Prior art keywords
cadmium
zinc
alkaline earth
per cent
sulphate
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
GB1042541A
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.)
ALEXANDER FRANK WELLS
Original Assignee
ALEXANDER FRANK WELLS
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 ALEXANDER FRANK WELLS filed Critical ALEXANDER FRANK WELLS
Priority to GB1042541A priority Critical patent/GB574321A/en
Publication of GB574321A publication Critical patent/GB574321A/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
    • C09K11/56—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing sulfur
    • C09K11/562—Chalcogenides
    • C09K11/567—Chalcogenides with alkaline earth metals
    • 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
    • C09K11/56—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing sulfur
    • C09K11/562—Chalcogenides
    • C09K11/565—Chalcogenides with zinc cadmium

Abstract

574,321. Luminescent materials. WELLS, A. F. Aug. 15, 1941, No. 10425. [Class 39 (i)] Luminescent materials containing alkaline earth metal sulphides in association with zinc or cadmium compounds are made by heating together at a temperature in the neighbourhood of 900-950‹ C. the constituent materials to form the sulphides in the presence of a salt or compound of either or both zinc or cadmium. The zinc or cadmium salts are preferably sulphates, but other salts such as tungstates, phosphates or sulphides are suitable ; in addition salts of the alkali or alkaline earth metals may be used. The activators may be bismuth or lead. The material may be made from the following constituents : 2 parts by weight of pure lime, 1.4 of pure sulphur, to which are added 10 per cent each of potassium chloride, cadmium sulphate and zinc sulphate, with lead in the proportion of .0008 gramme per gramme of calcium oxide. This gives a pale cream fluorescence. A similar preparation with 5 per cent potassium sulphide, 1 per cent of cadmium sulphate and 1 per cent of zinc sulphate gives a phosphor with bright white fluorescence.
GB1042541A 1941-08-15 1941-08-15 Improvements in and relating to luminescent materials or phosphors of the alkaline earth metal sulphide type Expired GB574321A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1042541A GB574321A (en) 1941-08-15 1941-08-15 Improvements in and relating to luminescent materials or phosphors of the alkaline earth metal sulphide type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1042541A GB574321A (en) 1941-08-15 1941-08-15 Improvements in and relating to luminescent materials or phosphors of the alkaline earth metal sulphide type

Publications (1)

Publication Number Publication Date
GB574321A true GB574321A (en) 1946-01-01

Family

ID=9967575

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1042541A Expired GB574321A (en) 1941-08-15 1941-08-15 Improvements in and relating to luminescent materials or phosphors of the alkaline earth metal sulphide type

Country Status (1)

Country Link
GB (1) GB574321A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3053772A (en) * 1960-03-02 1962-09-11 Philips Corp Red luminescent material for cathode-ray tubes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3053772A (en) * 1960-03-02 1962-09-11 Philips Corp Red luminescent material for cathode-ray tubes

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