GB1205298A - Luminescent materials - Google Patents

Luminescent materials

Info

Publication number
GB1205298A
GB1205298A GB50258/68A GB5025868A GB1205298A GB 1205298 A GB1205298 A GB 1205298A GB 50258/68 A GB50258/68 A GB 50258/68A GB 5025868 A GB5025868 A GB 5025868A GB 1205298 A GB1205298 A GB 1205298A
Authority
GB
United Kingdom
Prior art keywords
sio
mgo
luminescent
activated
oct
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
GB50258/68A
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 GB1205298A publication Critical patent/GB1205298A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/38—Devices for influencing the colour or wavelength of the light
    • H01J61/42—Devices for influencing the colour or wavelength of the light by transforming the wavelength of the light by luminescence
    • H01J61/44—Devices 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
    • C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
    • C09K11/77342—Silicates

Landscapes

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

Abstract

1,205,298. Luminescent materials and uses thereof. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 23 Oct., 1968 [26 Oct., 1967], No. 50258/68. Heading C4S. A luminescent alkaline earth silicate activated by divalent Eu is of formula (Ca x .Ba y .Sr z .Eu p O) 2 . MgO.(SiO 2 ) 2 wherein (x + y + z + p) = 1 and one or two of x, y and z may be zero and 0.05 # p # 0-003. Preferably x # 0.4 and preferred compositions are (Ba(1-p)Eu p O) 2 .MgO.(SiO 2 ) 2 wherein 0.01 # p # 0.04 and (Sr( 1-p )Eu p O) 2 .MgO (SiO 2 ) 2 wherein p = 0À01, 0.02 and 0À05. In preparation, the starting mix may be heated at 1050‹ C. for 1 hr., ground, fired at 1150‹ C. for 1 hr. in both cases in a N 2 -H 2 (20: 1) atmosphere. An excess of SiO 2 is used to promote a smooth reaction and calcium, barium or strontium fluoride may be used as a flux. Excitation by the entire u.v. range and deep blue radiation and electrons is disclosed and also 430 to 550 nm. emissions. Reference is made to incorporation in luminescent screens, C.R.T.s, LP and HPMV lamps for illumination and photochemical processes and admixture with Mn activated magnesium arsenate and Sb and Mn activated calcium halophosphate.
GB50258/68A 1967-10-26 1968-10-23 Luminescent materials Expired GB1205298A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6714517A NL6714517A (en) 1967-10-26 1967-10-26

Publications (1)

Publication Number Publication Date
GB1205298A true GB1205298A (en) 1970-09-16

Family

ID=19801557

Family Applications (1)

Application Number Title Priority Date Filing Date
GB50258/68A Expired GB1205298A (en) 1967-10-26 1968-10-23 Luminescent materials

Country Status (7)

Country Link
JP (1) JPS4837714B1 (en)
AT (1) AT279737B (en)
BE (1) BE722852A (en)
FR (1) FR1590046A (en)
GB (1) GB1205298A (en)
NL (1) NL6714517A (en)
SE (1) SE332674B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1253181A2 (en) * 2001-03-22 2002-10-30 Nec Corporation Phosphors and fluorescent lamps comprising the phosphors
EP1321500A2 (en) * 2001-12-19 2003-06-25 Sumitomo Chemical Company, Limited Method for producing silicate phosphor
EP1632545A1 (en) * 2003-05-16 2006-03-08 Sumitomo Chemical Company, Limited Phosphor and vacuum ultraviolet excited light-emitting device
WO2006131795A1 (en) * 2005-06-06 2006-12-14 Acol Technologies Sa Wavelenght shifting compositions

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997027267A1 (en) * 1996-01-22 1997-07-31 Kasei Optonix, Ltd. Photostimulable phosphor
JP4023222B2 (en) * 2002-05-31 2007-12-19 住友化学株式会社 Method for producing silicate phosphor
JP5197827B2 (en) * 2011-10-31 2013-05-15 キヤノン株式会社 Green phosphor and method for producing the same

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1253181A2 (en) * 2001-03-22 2002-10-30 Nec Corporation Phosphors and fluorescent lamps comprising the phosphors
EP1253181A3 (en) * 2001-03-22 2004-04-07 Nec Corporation Phosphors and fluorescent lamps comprising the phosphors
EP1321500A2 (en) * 2001-12-19 2003-06-25 Sumitomo Chemical Company, Limited Method for producing silicate phosphor
EP1321500A3 (en) * 2001-12-19 2005-07-27 Sumitomo Chemical Company, Limited Method for producing silicate phosphor
EP1632545A1 (en) * 2003-05-16 2006-03-08 Sumitomo Chemical Company, Limited Phosphor and vacuum ultraviolet excited light-emitting device
EP1632545A4 (en) * 2003-05-16 2008-01-02 Sumitomo Chemical Co Phosphor and vacuum ultraviolet excited light-emitting device
US7622057B2 (en) 2003-05-16 2009-11-24 Sumitomo Chemical Company, Limited Phosphor and vacuum ultraviolet excited light-emitting device
WO2006131795A1 (en) * 2005-06-06 2006-12-14 Acol Technologies Sa Wavelenght shifting compositions

Also Published As

Publication number Publication date
FR1590046A (en) 1970-04-06
DE1802060A1 (en) 1969-05-08
BE722852A (en) 1969-04-24
SE332674B (en) 1971-02-15
DE1802060B2 (en) 1977-06-16
JPS4837714B1 (en) 1973-11-13
NL6714517A (en) 1969-04-29
AT279737B (en) 1970-03-10

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Legal Events

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