GB1525927A - Phosphor materials - Google Patents

Phosphor materials

Info

Publication number
GB1525927A
GB1525927A GB4919674A GB4919674A GB1525927A GB 1525927 A GB1525927 A GB 1525927A GB 4919674 A GB4919674 A GB 4919674A GB 4919674 A GB4919674 A GB 4919674A GB 1525927 A GB1525927 A GB 1525927A
Authority
GB
United Kingdom
Prior art keywords
silicate
carbonate
group
aluminate
reducing atmosphere
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
GB4919674A
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.)
Secretary of State for Defence Canada
UK Secretary of State for Defence
Original Assignee
Secretary of State for Defence Canada
UK Secretary of State for Defence
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 Secretary of State for Defence Canada, UK Secretary of State for Defence filed Critical Secretary of State for Defence Canada
Priority to GB4919674A priority Critical patent/GB1525927A/en
Publication of GB1525927A publication Critical patent/GB1525927A/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
    • C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
    • C09K11/7737—Phosphates
    • C09K11/7738—Phosphates with alkaline earth metals

Landscapes

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

Abstract

1525927 Luminescence DEFENCE SECRETARY OF STATE FOR 5 Nov 1975 [13 Nov 1974] 49196/74 Heading C4S A phosphor material is produced by processing an intermediate divalent Eu activated mixed metal phosphate composition of the general formula before firing in a reducing atmosphere where M<SP>I</SP> is one of Li, Na, K, Rb, Cs; M<SP>II</SP> is one of Ca, Sr, Ba; a is 0À95 to 1À05 (e.g. 1À0), b is 0À95 to 1À05 (e.g. 0À98 to 1À03) and c is 0À0001 to 0À025 (e.g. 0À01), and an additive which is at least one of (i) a carbonate, silicate of a said Group Ia element, (ii) a carbonate, silicate, or aluminate of a said Group IIa element in such proportions that any of said carbonate, silicate or aluminate comprises up to 0À7 mole of the mixture, the phosphor being capable of electroluminescence, fluorescence, phosphorescence, and/or cathodoluminescence. The components may be slurried with water, and fired in a reducing atmosphere at 900 to 1200‹ C. so that sintering or fusing does not occur. Alternatively, starting materials for the intermediate.composition are mixed with at least one of a carbonate, or silicate of the Group Ia or Group IIa elements, or an aluminate of the Group IIa elements, slurrying, grinding, and firing stages being detailed before a further firing at 900 to 1100‹ C. in a reducing atmosphere. Specific phosphors are disclosed.
GB4919674A 1975-11-05 1975-11-05 Phosphor materials Expired GB1525927A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4919674A GB1525927A (en) 1975-11-05 1975-11-05 Phosphor materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4919674A GB1525927A (en) 1975-11-05 1975-11-05 Phosphor materials

Publications (1)

Publication Number Publication Date
GB1525927A true GB1525927A (en) 1978-09-27

Family

ID=10451521

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4919674A Expired GB1525927A (en) 1975-11-05 1975-11-05 Phosphor materials

Country Status (1)

Country Link
GB (1) GB1525927A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007125453A2 (en) * 2006-04-27 2007-11-08 Philips Intellectual Property & Standards Gmbh Illumination system comprising a radiation source and a luminescent material
CN101942301A (en) * 2010-09-16 2011-01-12 武汉工程大学 Phosphate red fluorescent powder for light-emitting diode and preparation method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007125453A2 (en) * 2006-04-27 2007-11-08 Philips Intellectual Property & Standards Gmbh Illumination system comprising a radiation source and a luminescent material
WO2007125453A3 (en) * 2006-04-27 2008-11-27 Philips Intellectual Property Illumination system comprising a radiation source and a luminescent material
CN101942301A (en) * 2010-09-16 2011-01-12 武汉工程大学 Phosphate red fluorescent powder for light-emitting diode and preparation method thereof
CN101942301B (en) * 2010-09-16 2013-10-30 武汉工程大学 Phosphate red fluorescent powder for light-emitting diode and preparation method thereof

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Legal Events

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