GB927352A - Improvements in or relating to the manufacture of phosphors - Google Patents

Improvements in or relating to the manufacture of phosphors

Info

Publication number
GB927352A
GB927352A GB1239460A GB1239460A GB927352A GB 927352 A GB927352 A GB 927352A GB 1239460 A GB1239460 A GB 1239460A GB 1239460 A GB1239460 A GB 1239460A GB 927352 A GB927352 A GB 927352A
Authority
GB
United Kingdom
Prior art keywords
metals
halophosphate
april
give
compounds
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
GB1239460A
Inventor
William Godfrey King
Christopher Robin John Leete
Alfred Hamilton Mckeag
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 GB1239460A priority Critical patent/GB927352A/en
Publication of GB927352A publication Critical patent/GB927352A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
    • B04C5/00—Apparatus in which the axial direction of the vortex is reversed
    • B04C5/08—Vortex chamber constructions
    • B04C5/081—Shapes or dimensions
    • 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
    • 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
    • C09K11/0855—Phosphates
    • C09K11/0861—Phosphates with alkaline earth metals
    • C09K11/0866—Phosphates with alkaline earth metals with halogens

Landscapes

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

Abstract

927,352. Luminescent materials and processing. GENERAL ELECTRIC CO. Ltd. April 6, 1961 [April 7, 1960], No. 12394/60. Class 39 (1). A method of manufacturing a halophosphate comprises subjecting the phosphate ingredient in powder form to a classification process and selecting only those particles within a required particle size range, heating a mixture of the ingredients and pulverizing and reclassifying the product. A halophosphate of the general formula 3M 3 (PO 4 ) 2 .M<SP>1</SP>L 2 , where M, M<SP>1</SP> are each one or more of the alkaline earth metals calcium, strontium, barium, and L is a halogen or a mixture of halogens, is prepared by heating together phosphates of the metals M, halides of the metals M<SP>1</SP>, compounds of the activator metals, e.g. antimony, tin, lead with or without manganese, and, if desired, compounds of M decomposable by heat to give the oxides of M, in the proportions required to give the halophosphate composition. The classification process may include an elutriation process as described in Specification 868,711 or a process involving the use of one or more hydrocyclones, as described in Specifications 927,351 and 927,354 and a particle size within the range 5- 25 microns is selected for use. A detailed example is described in which M is Ca and M<SP>1</SP> is composed of 82% Ca and 18% Sr.
GB1239460A 1960-04-07 1960-04-07 Improvements in or relating to the manufacture of phosphors Expired GB927352A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1239460A GB927352A (en) 1960-04-07 1960-04-07 Improvements in or relating to the manufacture of phosphors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1239460A GB927352A (en) 1960-04-07 1960-04-07 Improvements in or relating to the manufacture of phosphors

Publications (1)

Publication Number Publication Date
GB927352A true GB927352A (en) 1963-05-29

Family

ID=10003776

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1239460A Expired GB927352A (en) 1960-04-07 1960-04-07 Improvements in or relating to the manufacture of phosphors

Country Status (1)

Country Link
GB (1) GB927352A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3668141A (en) * 1969-04-28 1972-06-06 Mallinckrodt Chemical Works Process for precipitating luminescent alkaline earth haloapatites
FR2306015A1 (en) * 1975-03-29 1976-10-29 Stamicarbon PROCESS FOR RECOVERING USABLE MATERIALS FROM WASTE CONTAINING METALS AND NON-METALS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3668141A (en) * 1969-04-28 1972-06-06 Mallinckrodt Chemical Works Process for precipitating luminescent alkaline earth haloapatites
FR2306015A1 (en) * 1975-03-29 1976-10-29 Stamicarbon PROCESS FOR RECOVERING USABLE MATERIALS FROM WASTE CONTAINING METALS AND NON-METALS

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