GB1262321A - Luminescent materials - Google Patents

Luminescent materials

Info

Publication number
GB1262321A
GB1262321A GB233869A GB233869A GB1262321A GB 1262321 A GB1262321 A GB 1262321A GB 233869 A GB233869 A GB 233869A GB 233869 A GB233869 A GB 233869A GB 1262321 A GB1262321 A GB 1262321A
Authority
GB
United Kingdom
Prior art keywords
phosphor
luminescent materials
oxalates
jan
replaced
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
GB233869A
Inventor
James E Mathers
Gaetano D De Angelis
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.)
GTE Sylvania Inc
Original Assignee
GTE Sylvania Inc
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 GTE Sylvania Inc filed Critical GTE Sylvania Inc
Publication of GB1262321A publication Critical patent/GB1262321A/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
    • C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
    • C09K11/7767—Chalcogenides
    • C09K11/7769—Oxides
    • C09K11/7771—Oxysulfides

Landscapes

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

Abstract

1,262,321. Luminescent materials. GTE SYLVANIA Inc. 15 Jan., 1969 [19 Jan., 1968], No. 2338/69. Heading C4S. A phosphor comprises lanthanum oxysulphide activated by erbium preferably having the formula (La 1-x Er x ) 2 O 2 S, where 0À05>x>0À0005. The phosphor is prepared by dissolving separately La 2 O 3 and Er 2 O 3 in HNO 3 , mixing and precipitating La and Er oxalates by adding oxalic acid. The precipitate is filtered at 110‹ C., fired in air then in N 2 -H 2 S at 1250‹ C. The oxalates may be replaced by nitrates, oxides, sulphates, acetates and tartrates; H 2 S may be replaced by a compound, e.g. thioacetamide, which decomposes to form H 2 S on heating. The phosphor is used in colour TV tubes and fluorescent lamps. Reference has been directed by the Comptroller to Specification 1,121,055.
GB233869A 1968-01-19 1969-01-15 Luminescent materials Expired GB1262321A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US69917668A 1968-01-19 1968-01-19

Publications (1)

Publication Number Publication Date
GB1262321A true GB1262321A (en) 1972-02-02

Family

ID=24808264

Family Applications (1)

Application Number Title Priority Date Filing Date
GB233869A Expired GB1262321A (en) 1968-01-19 1969-01-15 Luminescent materials

Country Status (1)

Country Link
GB (1) GB1262321A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0523828A2 (en) * 1991-06-19 1993-01-20 Polaroid Corporation Optically pumped up coverting light source

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0523828A2 (en) * 1991-06-19 1993-01-20 Polaroid Corporation Optically pumped up coverting light source
EP0523828A3 (en) * 1991-06-19 1994-01-19 Polaroid Corp
EP0801123A2 (en) * 1991-06-19 1997-10-15 Polaroid Corporation Optically pumped up converting light source
EP0801123A3 (en) * 1991-06-19 1998-07-01 Polaroid Corporation Optically pumped up converting light source

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