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GB2020686A - Luminescent materials - Google Patents

Luminescent materials

Info

Publication number
GB2020686A
GB2020686A GB7915804A GB7915804A GB2020686A GB 2020686 A GB2020686 A GB 2020686A GB 7915804 A GB7915804 A GB 7915804A GB 7915804 A GB7915804 A GB 7915804A GB 2020686 A GB2020686 A GB 2020686A
Authority
GB
United Kingdom
Prior art keywords
materials
luminescent
europium
luminescent materials
linear combinations
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.)
Granted
Application number
GB7915804A
Other versions
GB2020686B (en
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB2020686A publication Critical patent/GB2020686A/en
Application granted granted Critical
Publication of GB2020686B publication Critical patent/GB2020686B/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
    • C09K11/7792—Aluminates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Luminescent Compositions (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

Luminescent materials which are red-luminescing rare earth metal manganese aluminates having a magneto-plumbite crystal structure, which is activated by europium and bivalent manganese or by cerium and bivalent manganese, and has a composition defined by one of the following formulae:- (a) [La0.92(1-x)EuxO0.08(1-x)] Mg1-yMnyAl11.13+0.2xO19 <IMAGE> (c) [La0.92(1-p)Ce0.92pO0.08] Mg1-yMnyAl11.13O0.19 (d) [La0.86(1-p)Ce0.86pO0.14]MnyAl11.90-0.67yO19 (e) linear combinations of (a) and (b) (f) linear combinations of (c) and (d), wherein 0.01 </= x </= 0.30 0.1 </= p </= 1.0 and 0.5 </= y </= 0.9. These luminescent materials are used in luminescent screens of low-pressure mercury vapour discharge lamps used to promote the growth of plants, on account of the emission by these materials of radiation in the deep red part of the spectrum. The materials may be used together with a blue-luminescing material e.g. a barium magnesium aluminate activated by europium.
GB7915804A 1978-05-11 1979-05-08 Luminescent materials Expired GB2020686B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7805067A NL7805067A (en) 1978-05-11 1978-05-11 LOW-PRESSURE MERCURY DISCHARGE LAMP.

Publications (2)

Publication Number Publication Date
GB2020686A true GB2020686A (en) 1979-11-21
GB2020686B GB2020686B (en) 1982-06-09

Family

ID=19830814

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7915804A Expired GB2020686B (en) 1978-05-11 1979-05-08 Luminescent materials

Country Status (6)

Country Link
JP (1) JPS54147183A (en)
BE (1) BE876143A (en)
DE (1) DE2917931A1 (en)
FR (1) FR2425724A1 (en)
GB (1) GB2020686B (en)
NL (1) NL7805067A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1070107A1 (en) * 1998-03-31 2001-01-24 Sarnoff Corporation Long persistence red phosphors

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5712428B2 (en) * 2009-10-23 2015-05-07 国立大学法人山梨大学 Red phosphor for ultraviolet excitation light source

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL160869C (en) * 1972-11-03 Philips Nv LUMINESCENT SCREEN, AS WELL AS DISCHARGE LAMP AND KATHODE BEAM TUBE, FITTED WITH SUCH SCREEN.
NL177757C (en) * 1975-04-16 1985-11-18 Philips Nv LUMINESCENT SCREEN, LOW-PRESSURE MERCURY DISCHARGE LAMP, AND METHOD FOR PREPARING A LUMINESCENT, CERIUM AND MANGANE ACTIVATED ALUMINATE.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1070107A1 (en) * 1998-03-31 2001-01-24 Sarnoff Corporation Long persistence red phosphors
EP1070107A4 (en) * 1998-03-31 2005-02-02 Sarnoff Corp RED FLUORES WITH LONG REPLACEMENT TIME

Also Published As

Publication number Publication date
BE876143A (en) 1979-11-09
JPS54147183A (en) 1979-11-17
FR2425724B1 (en) 1983-12-30
GB2020686B (en) 1982-06-09
DE2917931A1 (en) 1979-11-15
NL7805067A (en) 1979-11-13
FR2425724A1 (en) 1979-12-07

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Legal Events

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