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GB701031A - Improvements in and relating to a luminophore comprising a composite phosphate activated by cerium - Google Patents

Improvements in and relating to a luminophore comprising a composite phosphate activated by cerium

Info

Publication number
GB701031A
GB701031A GB821149A GB821149A GB701031A GB 701031 A GB701031 A GB 701031A GB 821149 A GB821149 A GB 821149A GB 821149 A GB821149 A GB 821149A GB 701031 A GB701031 A GB 701031A
Authority
GB
United Kingdom
Prior art keywords
cerium
metals
luminophore
relating
composite
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
GB821149A
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.)
GORDON GUSTAF BERTRAM ANDERSON
GUNNAR GEORG JOHAN GUENTHER
Auralight AB
Original Assignee
GORDON GUSTAF BERTRAM ANDERSON
GUNNAR GEORG JOHAN GUENTHER
Lumalampan AB
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 GORDON GUSTAF BERTRAM ANDERSON, GUNNAR GEORG JOHAN GUENTHER, Lumalampan AB filed Critical GORDON GUSTAF BERTRAM ANDERSON
Priority to GB821149A priority Critical patent/GB701031A/en
Publication of GB701031A publication Critical patent/GB701031A/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
    • C09K11/7715—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing cerium
    • C09K11/7723—Phosphates

Landscapes

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

Abstract

701,031. Luminescent materials. GUNTHER, G. G. J., ANDERSON, G. G. B., and LUMALAMPEN AKTIEBOLAG. March 25, 1949, No. 8211/49. Class 39(1) Luminescent material comprises a sintered material containing a composite orthophosphate of aluminium and at least one metal of the second group of the periodic system having an atomic weight less than 200, activated by cerium in trivalent form. The molar ratio of Al 2 O 3 : MeO in the material lies within the limits 3: 1 and 1:3, preferably 1:1. The cerium is contained in the material to the amount of 0.1-20 per cent, measured as Ce 2 O3. The sintering process can either be effected in one stage in damp hydrogen, or heating may be effective first in air to 1000-1250‹C (which partially oxidizes the cerium to tetravalent form), and thereafter in a hydrogen atmosphere for reduction of the cerium to trivalent form. Increased intensity of the material and displacements of the emission spectrum are obtained by minor admixtures of metals acting either as secondary activating agents or to increase absorption, e.g. at least one of the metals Pb, La, Zr, Bi, U, Tl and V. Methods of preparing composite phosphates of Al with Mg, Zn, Ca, Ca, and Ba, Sr and Zn, Ca and Ba and Mg, Sr and Mg, and Be are described. Specifications 512,154 and 645,335 are referred to.
GB821149A 1949-03-25 1949-03-25 Improvements in and relating to a luminophore comprising a composite phosphate activated by cerium Expired GB701031A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB821149A GB701031A (en) 1949-03-25 1949-03-25 Improvements in and relating to a luminophore comprising a composite phosphate activated by cerium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB821149A GB701031A (en) 1949-03-25 1949-03-25 Improvements in and relating to a luminophore comprising a composite phosphate activated by cerium

Publications (1)

Publication Number Publication Date
GB701031A true GB701031A (en) 1953-12-16

Family

ID=9848016

Family Applications (1)

Application Number Title Priority Date Filing Date
GB821149A Expired GB701031A (en) 1949-03-25 1949-03-25 Improvements in and relating to a luminophore comprising a composite phosphate activated by cerium

Country Status (1)

Country Link
GB (1) GB701031A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2921912A (en) * 1954-11-01 1960-01-19 Westinghouse Electric Corp Magnesium-calcium fluorophosphate
WO2013003389A1 (en) * 2011-06-29 2013-01-03 General Electric Company Green emitting phosphors

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2921912A (en) * 1954-11-01 1960-01-19 Westinghouse Electric Corp Magnesium-calcium fluorophosphate
WO2013003389A1 (en) * 2011-06-29 2013-01-03 General Electric Company Green emitting phosphors
US8663501B2 (en) 2011-06-29 2014-03-04 General Electric Company Green emitting phosphor

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