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GB449392A - Improvements in or relating to fluorescent or luminescent screens suitable for use in cathode ray tubes, or for use as rontgen ray transmitting or intensifying screens - Google Patents

Improvements in or relating to fluorescent or luminescent screens suitable for use in cathode ray tubes, or for use as rontgen ray transmitting or intensifying screens

Info

Publication number
GB449392A
GB449392A GB3642534A GB3642534A GB449392A GB 449392 A GB449392 A GB 449392A GB 3642534 A GB3642534 A GB 3642534A GB 3642534 A GB3642534 A GB 3642534A GB 449392 A GB449392 A GB 449392A
Authority
GB
United Kingdom
Prior art keywords
zinc
sulphide
screens
fluorescent
cadmium
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
GB3642534A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Priority to GB3642534A priority Critical patent/GB449392A/en
Publication of GB449392A publication Critical patent/GB449392A/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

Landscapes

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

Abstract

Non-caking materials for use in fluorescent screens for cathode-ray tubes or for transmitting or intensifying screens for X-ray work consist of zinc sulphide, cadmium sulphide, zinc-cadmium sulphide, or zinc-cadmium-manganese sulphide prepared by coating the grains of the material as a result of a washing operation with an amorphous or fine crystalline deposit of aluminium hydroxide, zinc sulphide, zinc oxide, or zinc oxychloride. The fluorescent material may be washed with a solution of an aluminium salt and then with ammonia solution or first with a solution of a zinc salt, e.g. zinc chloride, and then with water forming zinc oxychloride or with sulphuretted hydrogen water forming zinc sulphide. The deposition may be carried out before or after the usual heating process but if the deposit is formed before heating, care must be taken to avoid volatilization during heating. The Specification as open to inspection under Sect. 91 describes also the use of other deposited substances especially alkaline earth carbonates and coloured substances, the colour influencing the final colour of the screen emission. This subject-matter does not appear in the Specification as accepted.
GB3642534A 1934-12-19 1934-12-19 Improvements in or relating to fluorescent or luminescent screens suitable for use in cathode ray tubes, or for use as rontgen ray transmitting or intensifying screens Expired GB449392A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3642534A GB449392A (en) 1934-12-19 1934-12-19 Improvements in or relating to fluorescent or luminescent screens suitable for use in cathode ray tubes, or for use as rontgen ray transmitting or intensifying screens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3642534A GB449392A (en) 1934-12-19 1934-12-19 Improvements in or relating to fluorescent or luminescent screens suitable for use in cathode ray tubes, or for use as rontgen ray transmitting or intensifying screens

Publications (1)

Publication Number Publication Date
GB449392A true GB449392A (en) 1936-06-19

Family

ID=10388017

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3642534A Expired GB449392A (en) 1934-12-19 1934-12-19 Improvements in or relating to fluorescent or luminescent screens suitable for use in cathode ray tubes, or for use as rontgen ray transmitting or intensifying screens

Country Status (1)

Country Link
GB (1) GB449392A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2571905A (en) * 1947-08-28 1951-10-16 Westinghouse Electric Corp Zinc sulfide x-ray phosphors
US2651584A (en) * 1948-09-25 1953-09-08 Westinghouse Electric Corp X-ray fluorescent screen
US2758941A (en) * 1954-11-18 1956-08-14 Rca Corp Luminescent materials and applications thereof
US2817599A (en) * 1954-10-25 1957-12-24 Rca Corp Method of coating phosphor particles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2571905A (en) * 1947-08-28 1951-10-16 Westinghouse Electric Corp Zinc sulfide x-ray phosphors
US2651584A (en) * 1948-09-25 1953-09-08 Westinghouse Electric Corp X-ray fluorescent screen
US2817599A (en) * 1954-10-25 1957-12-24 Rca Corp Method of coating phosphor particles
US2758941A (en) * 1954-11-18 1956-08-14 Rca Corp Luminescent materials and applications thereof

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