GB1158755A - Improvements relating to Luminescent Materials - Google Patents

Improvements relating to Luminescent Materials

Info

Publication number
GB1158755A
GB1158755A GB1338867A GB1338867A GB1158755A GB 1158755 A GB1158755 A GB 1158755A GB 1338867 A GB1338867 A GB 1338867A GB 1338867 A GB1338867 A GB 1338867A GB 1158755 A GB1158755 A GB 1158755A
Authority
GB
United Kingdom
Prior art keywords
march
hours
luminescent materials
oxygen current
dry oxygen
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
GB1338867A
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 Electronics UK Ltd
Original Assignee
Philips Electronic and Associated 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 Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1158755A publication Critical patent/GB1158755A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
    • C09K11/7784—Chalcogenides
    • 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
    • C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
    • C09K11/7784—Chalcogenides
    • C09K11/7787—Oxides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Luminescent Compositions (AREA)
  • Transmissions By Endless Flexible Members (AREA)

Abstract

1,158,755. Luminescent materials and uses thereof. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 22 March, 1967 [25 March, 1966], No. 13388/67. Heading C4S. A red luminescing material comprises a compound having the formula AB (1-x) Eu x O 2 where A is an alkali metal, preferably Na and/or Li and B is one or more of the trivalent metals Y, Gd, Lu, La, Sc, In preferably Y, Gd and/or Lu and wherein 0À4>x>0À0001 preferably 0À2>x>0À005, e.g. x =0À01, 0.05 or 0À1. A number of specific compositions are disclosed. Excitation by electrons, short wave ultra-violet radiation (2537Š for example), or X-rays produces an emission maximum between 610 nm. and 615 nm. and the white body colour material may be used in colour television tubes, X-ray tubes, and mercury vapour discharge lamps for instance. In the preparation the starting materials, anhydrous Na 2 CO 3 , Gd 2 O 3 and Eu 2 O 3 for example are mixed and heated in a dry atmosphere at 900‹ to 1200‹ C., for example, for 4 hours at 910‹ C. in a dry oxygen current, the reaction mixture is cooled, ground and dried and reheated for 4 hours at approximately 1100‹ C. in a dry oxygen current. The product may be graded by a sieve with apertures of less than 200 microns.
GB1338867A 1966-03-25 1967-03-22 Improvements relating to Luminescent Materials Expired GB1158755A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6603921A NL6603921A (en) 1966-03-25 1966-03-25

Publications (1)

Publication Number Publication Date
GB1158755A true GB1158755A (en) 1969-07-16

Family

ID=19796089

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1338867A Expired GB1158755A (en) 1966-03-25 1967-03-22 Improvements relating to Luminescent Materials

Country Status (10)

Country Link
AT (1) AT269235B (en)
BE (1) BE696119A (en)
CA (1) CA932946A (en)
CH (1) CH466032A (en)
DE (1) DE1614228C3 (en)
DK (1) DK121387B (en)
GB (1) GB1158755A (en)
NL (1) NL6603921A (en)
NO (1) NO124399B (en)
SE (1) SE324023B (en)

Also Published As

Publication number Publication date
NL6603921A (en) 1967-09-26
AT269235B (en) 1969-03-10
BE696119A (en) 1967-09-25
CH466032A (en) 1968-11-30
SE324023B (en) 1970-05-19
DK121387B (en) 1971-10-11
DE1614228B2 (en) 1975-05-22
NO124399B (en) 1972-04-10
DE1614228A1 (en) 1970-06-25
DE1614228C3 (en) 1976-01-08
CA932946A (en) 1973-09-04

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee