GB925709A - Improvements in or relating to sources of radiation comprising a luminescent layer - Google Patents

Improvements in or relating to sources of radiation comprising a luminescent layer

Info

Publication number
GB925709A
GB925709A GB3756759A GB3756759A GB925709A GB 925709 A GB925709 A GB 925709A GB 3756759 A GB3756759 A GB 3756759A GB 3756759 A GB3756759 A GB 3756759A GB 925709 A GB925709 A GB 925709A
Authority
GB
United Kingdom
Prior art keywords
luminescent layer
layer
luminescent
strontium
copper
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
GB3756759A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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 Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB925709A publication Critical patent/GB925709A/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
    • C09K11/70—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus
    • C09K11/708—Borates
    • 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
    • C09K11/70—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus
    • C09K11/71—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus also containing alkaline earth metals
    • 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
    • C09K11/70—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus
    • C09K11/72—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus also containing halogen, e.g. halophosphates
    • C09K11/727—Aluminates; Silicates

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

925,709. Luminescent materials; discharge lamps. PHILIPS ELECTRICAL INDUSTRIES Ltd. Nov. 5, 1959 [Nov. 8, 1958], No. 37567/59. Drawings to Specification. Class 39 (1). A source of radiation comprises the combination of a gas and/or vapour discharge tube, such as a low pressure mercury vapour discharge tube, and a luminescent layer on support means, in which the layer contains a phosphate activated with monovalent copper and, if desired, with bivalent manganese, if the composition. in which Me represents at least one of the elements Al, Mg, Zn, Cd and B, and in which x, y, z, p and q are subject to specified numerical conditions. A layer, e.g. of titanium dioxide, for reflecting light emitted by the luminescent layer can be provided on part of the tube envelope between the luminescent layer and the envelope. The luminescent material can be prepared by mixing specified compounds of the desired elements and heating for 1 to 2 hours in a non-oxidizing atmosphere, for example a reducing atmosphere of nitrogen or a mixture of nitrogen and hydrogens, at a temperature between 1000‹ and 1250‹ C. A mixture of strontium hydrogen phosphate or de-ammonium hydrogen phosphate and strontium carbonate can be used for the introduction of strontium and of the phosphate group. Copper sulphate in cupric form can be used for the introduction of copper, and the heating is carried out in a neutral or reducing atmosphere. Manganese, if used, can be introduced as MnNH 4 F 3 or other specified compounds. Several specific examples are described.
GB3756759A 1958-11-08 1959-11-05 Improvements in or relating to sources of radiation comprising a luminescent layer Expired GB925709A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL233044 1958-11-08

Publications (1)

Publication Number Publication Date
GB925709A true GB925709A (en) 1963-05-08

Family

ID=19751421

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3756759A Expired GB925709A (en) 1958-11-08 1959-11-05 Improvements in or relating to sources of radiation comprising a luminescent layer

Country Status (3)

Country Link
CH (1) CH406424A (en)
ES (1) ES253188A1 (en)
GB (1) GB925709A (en)

Also Published As

Publication number Publication date
CH406424A (en) 1966-01-31
ES253188A1 (en) 1960-04-16

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