GB733077A - Improvements in or relating to cathode-ray tubes comprising luminescent screens - Google Patents

Improvements in or relating to cathode-ray tubes comprising luminescent screens

Info

Publication number
GB733077A
GB733077A GB14944/52A GB1494452A GB733077A GB 733077 A GB733077 A GB 733077A GB 14944/52 A GB14944/52 A GB 14944/52A GB 1494452 A GB1494452 A GB 1494452A GB 733077 A GB733077 A GB 733077A
Authority
GB
United Kingdom
Prior art keywords
mol
alkaline earth
per cent
luminescent
trivalent cerium
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
GB14944/52A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB733077A publication Critical patent/GB733077A/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
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7715—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing cerium
    • C09K11/7721—Aluminates
    • 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
    • C09K11/64—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing aluminium
    • C09K11/646—Silicates
    • 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
    • C09K9/00—Tenebrescent materials, i.e. materials for which the range of wavelengths for energy absorption is changed as a result of excitation by some form of energy
    • 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
    • H01J29/14—Screens on or from which an image or pattern is formed, picked up, converted or stored acting by discoloration, e.g. halide screen
    • 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
    • H01J29/20—Luminescent screens characterised by the luminescent material

Landscapes

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

Abstract

733,077. Luminescent materials. PHILIPS ELECTRICAL INDUSTRIES, Ltd. June 13, 1952 [June 16, 1951], No. 14944/52. Drawings to Specification. Class 39 (1). A high vacuum cathode-ray tube for use in apparatus for televising films or diapositives and in radar apparatus comprises a luminescent screen which contains a luminescent material which will emit radiation in the short-wave blue and long-wave ultra-violet parts of the spectrum, said material being activated by trivalent cerium and having a decay time of the fluorescence shorter than 10<SP>-6</SP> sec., which material is a crystallized fired reaction product consisting solely of silicon, oxygen, one or more alkaline earth metals and, if desired, aluminium, said elements being present in such quantities that the material can be symbolically represented by a point within a specified domain in the ternary system M-SiO 2 -Al 2 O 3 , M representing the alkaline earth metals. The cerium content of the material is between 0.05 and 10 mol. per cent of the total quantity of alkaline earth oxide. Methods of preparing luminescent materials of the composition 2CaO.Al 2 O 3 .SiO 2 : 2 mol. per cent of trivalent cerium and 2SrO.Si0 2 : 2 mol. per cent of trivalent cerium are described. Specification 652,091 is referred to.
GB14944/52A 1951-06-16 1952-06-13 Improvements in or relating to cathode-ray tubes comprising luminescent screens Expired GB733077A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1066162X 1951-06-16

Publications (1)

Publication Number Publication Date
GB733077A true GB733077A (en) 1955-07-06

Family

ID=19868264

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14944/52A Expired GB733077A (en) 1951-06-16 1952-06-13 Improvements in or relating to cathode-ray tubes comprising luminescent screens

Country Status (4)

Country Link
DE (1) DE923614C (en)
FR (1) FR1066162A (en)
GB (1) GB733077A (en)
SE (1) SE157052C1 (en)

Also Published As

Publication number Publication date
FR1066162A (en) 1954-06-02
DE923614C (en) 1955-02-17
SE157052C1 (en) 1956-11-27

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