GB965902A - Improvements relating to the manufacture of transparent luminescent screens - Google Patents

Improvements relating to the manufacture of transparent luminescent screens

Info

Publication number
GB965902A
GB965902A GB2811859A GB2811859A GB965902A GB 965902 A GB965902 A GB 965902A GB 2811859 A GB2811859 A GB 2811859A GB 2811859 A GB2811859 A GB 2811859A GB 965902 A GB965902 A GB 965902A
Authority
GB
United Kingdom
Prior art keywords
phosphor
base material
activator
powder
transparent
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
GB2811859A
Inventor
George Christie Turner
Stewart Woodcock
Dennis Frederick Cresswell
Herbert Meyer
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.)
Ferranti International PLC
Original Assignee
Ferranti PLC
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 Ferranti PLC filed Critical Ferranti PLC
Priority to GB2811859A priority Critical patent/GB965902A/en
Publication of GB965902A publication Critical patent/GB965902A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H01J9/22—Applying luminescent coatings
    • H01J9/221—Applying luminescent coatings in continuous layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H01J9/22—Applying luminescent coatings
    • H01J9/221—Applying luminescent coatings in continuous layers
    • H01J9/224—Applying luminescent coatings in continuous layers by precipitation

Abstract

Method of manufacturing a transparent luminescent screen comprises forming, e.g. by vacuum coating, a transparent layer of the base material of a phosphor on a transparent supporting plate, effecting contact between the whole of the free surface of the layer and a mass of powder of the phosphor or a mixture of powders of the phosphor base material and the activator which can be in excess, and heating the powder at such a temperature and for such a time as to cause activator ions to diffuse into the appropriate lattice sites in the transparent layer to cause activation thereof. A quartz supporting plate can be placed on or in a bed of phosphor powder with the transparent layer facing downwards. Phosphor base modifying constituents can be introduced during the formation of the transparent layer of base material on the supporting plate or can be introduced by diffusion from the mass of phosphor powder. In one example magnesium potassium fluoride is the base material, zinc fluoride is the base modifying constituent and manganese is the activator and heating is at 800 DEG C. for 2 minutes. In another example the phosphor base material is zinc sulphide and the activator is silver and heating is at 850 DEG C. for 5 minutes.
GB2811859A 1959-08-18 1959-08-18 Improvements relating to the manufacture of transparent luminescent screens Expired GB965902A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2811859A GB965902A (en) 1959-08-18 1959-08-18 Improvements relating to the manufacture of transparent luminescent screens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2811859A GB965902A (en) 1959-08-18 1959-08-18 Improvements relating to the manufacture of transparent luminescent screens

Publications (1)

Publication Number Publication Date
GB965902A true GB965902A (en) 1964-08-06

Family

ID=10270559

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2811859A Expired GB965902A (en) 1959-08-18 1959-08-18 Improvements relating to the manufacture of transparent luminescent screens

Country Status (1)

Country Link
GB (1) GB965902A (en)

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