GB612270A - Improvements in fluorescent materials and in screens comprised thereof - Google Patents

Improvements in fluorescent materials and in screens comprised thereof

Info

Publication number
GB612270A
GB612270A GB1552346A GB1552346A GB612270A GB 612270 A GB612270 A GB 612270A GB 1552346 A GB1552346 A GB 1552346A GB 1552346 A GB1552346 A GB 1552346A GB 612270 A GB612270 A GB 612270A
Authority
GB
United Kingdom
Prior art keywords
zinc
silver
selenide
fluorescing
sulpho
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
GB1552346A
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.)
Derby & Co Ltd
Original Assignee
Derby & 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 Derby & Co Ltd filed Critical Derby & Co Ltd
Priority to GB1552346A priority Critical patent/GB612270A/en
Publication of GB612270A publication Critical patent/GB612270A/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
    • C09K11/0805—Chalcogenides
    • C09K11/0811—Chalcogenides with zinc or cadmium
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/187—Luminescent screens screens with more than one luminescent material (as mixtures for the treatment of the screens)

Landscapes

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

Abstract

612,270. Luminescent materials. DERBY & CO., Ltd., and MEYER, H. May 22, 1946, No. 15523. [Class 39 (i)] A white-fluorescing material comprises an admixture of blue-fluorescing zinc sulphide actuated by silver, yellow - fluorescing zinc beryllium silicate activated by manganese, and yellow-fluorescing zinc sulpho-selenide (or zinc cadmium sulpho-selenide) actuated by copper or silver, or both. The zinc sulphide contains .005 per cent of silver and 2 per cent beryllium oxide to improve stability. The silicate may contain cadmium oxide and/or aluminium oxide. The sulpho-selenide component is prepared by mixing the sulphide and the selenide, both prepared by precipitation from a purified ammoniacal zinc or zinc-cadmium salt solution, adding .002 per cent of silver as soluble salt in solution and a flux, e.g. a halide or a borate with or without beryllium oxide, and firing at 700-900‹ C.
GB1552346A 1946-05-22 1946-05-22 Improvements in fluorescent materials and in screens comprised thereof Expired GB612270A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1552346A GB612270A (en) 1946-05-22 1946-05-22 Improvements in fluorescent materials and in screens comprised thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1552346A GB612270A (en) 1946-05-22 1946-05-22 Improvements in fluorescent materials and in screens comprised thereof

Publications (1)

Publication Number Publication Date
GB612270A true GB612270A (en) 1948-11-10

Family

ID=10060637

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1552346A Expired GB612270A (en) 1946-05-22 1946-05-22 Improvements in fluorescent materials and in screens comprised thereof

Country Status (1)

Country Link
GB (1) GB612270A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2676154A (en) * 1949-12-29 1954-04-20 Rca Corp Luminescent screen composition
US3251714A (en) * 1961-07-13 1966-05-17 Philips Corp Method of preparing a cadmium oxide photoconductor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2676154A (en) * 1949-12-29 1954-04-20 Rca Corp Luminescent screen composition
US3251714A (en) * 1961-07-13 1966-05-17 Philips Corp Method of preparing a cadmium oxide photoconductor

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