GB1192951A - Improvements in or relating to Luminescent Materials and their manufacture - Google Patents

Improvements in or relating to Luminescent Materials and their manufacture

Info

Publication number
GB1192951A
GB1192951A GB409667A GB409667A GB1192951A GB 1192951 A GB1192951 A GB 1192951A GB 409667 A GB409667 A GB 409667A GB 409667 A GB409667 A GB 409667A GB 1192951 A GB1192951 A GB 1192951A
Authority
GB
United Kingdom
Prior art keywords
phosphor
additive
added
heated
luminescent materials
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
GB409667A
Inventor
Henry Leonard Burrus
Adrian Geoffrey Paulusz
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.)
General Electric Co PLC
Original Assignee
General Electric Co 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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB409667A priority Critical patent/GB1192951A/en
Publication of GB1192951A publication Critical patent/GB1192951A/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
    • C09K11/7783—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
    • C09K11/7794—Vanadates; Chromates; Molybdates; Tungstates
    • 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
    • C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
    • C09K11/7776—Vanadates; Chromates; Molybdates; Tungstates

Landscapes

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

Abstract

1,192,951. Luminescent materials. GENERAL ELECTRIC & ENGLISH ELECTRIC COMPANIES Ltd. 23 April, 1968 [27 Jan.. 1967], No. 4096/67. Heading C4S. YVO 4 phosphor actuated by Eu, Sm or Dy contains an additive of Be, Mg, Ca, Sr, Ba, Zn or B in an amount to increase its brightness of luminescence when excited by cathode rays and U.V. radiation. The phosphor is prepared by heating twice a mixture of Y 2 O 3 , NH 4 V0 3 , Eu 2 0 3 and H 3 BO 3 in air, the Y 2 0 3 may be added in stages during heating. Another method comprises adding HCl to an aqueous suspension of Y 2 O 3 and Eu 2 O 3 to form an acid solution. This is added to an NB 4 VO 3 solution in NH 4 0H to precipitate rare earth and Y vanadate which is mixed with H 3 B0 3 and heated three times. In other methods an aqueous solution of one ingredient is formed and the remaining ingredients are added or mixed oxalates of Y, rare earth and additive are co-precipitated and this is heated with V 2 O 5 or NH 4 VO 3 . The additive may be in the form of MgBr 2 , MgO, MgS0 4 , CaBr 2 , SrCl 2 , Ba(N0 3 ) 2 or ZnCl 2 . The phosphor is used in C.R.T.'s and Hg vapour discharge tubes.
GB409667A 1967-01-27 1967-01-27 Improvements in or relating to Luminescent Materials and their manufacture Expired GB1192951A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB409667A GB1192951A (en) 1967-01-27 1967-01-27 Improvements in or relating to Luminescent Materials and their manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB409667A GB1192951A (en) 1967-01-27 1967-01-27 Improvements in or relating to Luminescent Materials and their manufacture

Publications (1)

Publication Number Publication Date
GB1192951A true GB1192951A (en) 1970-05-28

Family

ID=9770683

Family Applications (1)

Application Number Title Priority Date Filing Date
GB409667A Expired GB1192951A (en) 1967-01-27 1967-01-27 Improvements in or relating to Luminescent Materials and their manufacture

Country Status (1)

Country Link
GB (1) GB1192951A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6402987B1 (en) * 1999-12-01 2002-06-11 General Electric Company YMO4:Eu,L phoshpor with improved lumen maintenance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6402987B1 (en) * 1999-12-01 2002-06-11 General Electric Company YMO4:Eu,L phoshpor with improved lumen maintenance

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Legal Events

Date Code Title Description
PS Patent sealed
48S Specification amended (sect. 8/1949)
PLNP Patent lapsed through nonpayment of renewal fees