GB1414381A - Luminescent materials - Google Patents

Luminescent materials

Info

Publication number
GB1414381A
GB1414381A GB1773*[A GB1773A GB1414381A GB 1414381 A GB1414381 A GB 1414381A GB 1773 A GB1773 A GB 1773A GB 1414381 A GB1414381 A GB 1414381A
Authority
GB
United Kingdom
Prior art keywords
calcium
luminescent materials
chlorosilicate
luminescent
cathoderays
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
GB1773*[A
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 GB1773*[A priority Critical patent/GB1414381A/en
Publication of GB1414381A publication Critical patent/GB1414381A/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
    • C09K11/77342—Silicates

Landscapes

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

Abstract

1414381 Luminescent materials and uses thereof GENERAL ELECTRIC CO Ltd 31 Dec 1973 [1 Jan 1973] 17/73 Addition to 1087655 Heading C4S A luminescent material which is a modification of the material claimed in claim 1 of the parent Specification consists of calcium chlorosilicate, Ca 2 SiO 4 . CaCl 2 , activated by divalent Eu so as to be excitable by U.V. radiation of wavelengths 2537Š and 3650Š and by cathoderays, the Eu being in amount 0À001 to 0À1 mole per cent of the calcium chlorosilicate. The crystal structure is referred to, the phosphor exhibits rapid rate of rise and decay of emulsion and operates up to 300‹ C. Detailed preparations are described. Excess of calcium chloride functions as flux. At least part of the heating at at least 600‹ C. is in a neutral or reducing atmosphere to ensure Eu divalency. Eu: calcium silicate may be preformed.
GB1773*[A 1973-01-01 1973-01-01 Luminescent materials Expired GB1414381A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1773*[A GB1414381A (en) 1973-01-01 1973-01-01 Luminescent materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1773*[A GB1414381A (en) 1973-01-01 1973-01-01 Luminescent materials

Publications (1)

Publication Number Publication Date
GB1414381A true GB1414381A (en) 1975-11-19

Family

ID=9696885

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1773*[A Expired GB1414381A (en) 1973-01-01 1973-01-01 Luminescent materials

Country Status (1)

Country Link
GB (1) GB1414381A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2438012A1 (en) * 1978-10-03 1980-04-30 Rhone Poulenc Ind HYDRATED STRONTIUM FLUOSILICATES, ACTIVE AT DIVALENT EUROPE
US4220551A (en) * 1978-07-28 1980-09-02 Rhone-Poulenc Industries Novel blue light emitting luminophors
US7368179B2 (en) 2003-04-21 2008-05-06 Sarnoff Corporation Methods and devices using high efficiency alkaline earth metal thiogallate-based phosphors
WO2009094976A1 (en) * 2008-01-31 2009-08-06 Osram Opto Semiconductors Gmbh Lighting device for back-lighting a display and a display with one such lighting device
US7713442B2 (en) 2006-10-03 2010-05-11 Lightscape Materials, Inc. Metal silicate halide phosphors and LED lighting devices using the same
US8906262B2 (en) 2005-12-02 2014-12-09 Lightscape Materials, Inc. Metal silicate halide phosphors and LED lighting devices using the same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4220551A (en) * 1978-07-28 1980-09-02 Rhone-Poulenc Industries Novel blue light emitting luminophors
FR2438012A1 (en) * 1978-10-03 1980-04-30 Rhone Poulenc Ind HYDRATED STRONTIUM FLUOSILICATES, ACTIVE AT DIVALENT EUROPE
US7368179B2 (en) 2003-04-21 2008-05-06 Sarnoff Corporation Methods and devices using high efficiency alkaline earth metal thiogallate-based phosphors
US8906262B2 (en) 2005-12-02 2014-12-09 Lightscape Materials, Inc. Metal silicate halide phosphors and LED lighting devices using the same
US7713442B2 (en) 2006-10-03 2010-05-11 Lightscape Materials, Inc. Metal silicate halide phosphors and LED lighting devices using the same
WO2009094976A1 (en) * 2008-01-31 2009-08-06 Osram Opto Semiconductors Gmbh Lighting device for back-lighting a display and a display with one such lighting device

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees