GB1502707A - Fluorescent compositions and lowvelocity electron excited fluorescent display devices utilizing the same - Google Patents

Fluorescent compositions and lowvelocity electron excited fluorescent display devices utilizing the same

Info

Publication number
GB1502707A
GB1502707A GB27085/76A GB2708576A GB1502707A GB 1502707 A GB1502707 A GB 1502707A GB 27085/76 A GB27085/76 A GB 27085/76A GB 2708576 A GB2708576 A GB 2708576A GB 1502707 A GB1502707 A GB 1502707A
Authority
GB
United Kingdom
Prior art keywords
phosphor
compositions
low velocity
display devices
fluorescent
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
GB27085/76A
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.)
Dai Nippon Toryo KK
Original Assignee
Dai Nippon Toryo KK
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
Priority claimed from JP8194875A external-priority patent/JPS5210875A/en
Priority claimed from JP8194975A external-priority patent/JPS5210876A/en
Application filed by Dai Nippon Toryo KK filed Critical Dai Nippon Toryo KK
Publication of GB1502707A publication Critical patent/GB1502707A/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
    • C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
    • C09K11/7767—Chalcogenides
    • C09K11/7769—Oxides
    • C09K11/7771—Oxysulfides
    • 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
    • C09K11/0805—Chalcogenides
    • 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
    • C09K11/64—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing aluminium
    • C09K11/641—Chalcogenides
    • C09K11/642—Chalcogenides with zinc or cadmium
    • 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
    • C09K11/7729—Chalcogenides
    • C09K11/7731—Chalcogenides with 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
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
    • C09K11/7794—Vanadates; Chromates; Molybdates; Tungstates

Landscapes

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

Abstract

1502707 Luminescent compositions DAI NIPPON TORYO CO Ltd 29 June 1976 [4 July 1975 (2)] 27085/76 Heading C4S [Also in Division H1] A fluorescent composition contains In 2 O 3 and Al phosphor (0#x#0À1) and optionally Zn 2 SiO 4 :Mn, the In 2 O 3 to phosphor being in the wt. ratio range of 1:9 to 9:1. The phosphor is green emitting under low velocity (<100 eV) electron incidence. Various forms and preparations of In 2 O 3 are detailed and the phosphor may be formed by mixing chemically precipitated ZnS and CdS, adding specified Cu and Al compounds, and firing at 900‹ to 1200‹ C. in a sulphuric atmosphere (e.g. hydrogen sulphide or sulphide). The activator concentration is preferably 10<SP>-5</SP> to 10<SP>-3</SP> grams/grm of the host. The In 2 O 3 and phosphor may be mechanically mixed. The In 2 O 3 is considered to enhance the electrical conductivity. Low velocity electron excited fluorescent display devices may be used as desk top calculators and measuring instruments. Figs. 1 and 2 (not shown) include anode plate (11), ceramic vase (13), two or more wire cathodes (14), and grid (15) for diverging low velocity electrons in a 10<SP>-5</SP> to 10<SP>-9</SP> torr vacuum. An anodic plate may be sedimentation coated, using an aqueous suspension containing 0À01 to 1% of water glass to improve adhesion, to 5 to 30 mg. of phosphor/cm.<SP>2</SP>. Cathode, anode and grid mesh details and dimensions are given. The anodic plate may be in the form of a character, number or pattern, the potential being selectively applied to the separated anodes while multicolour screens may include anodes in the form of dots or lines, respective portions including different phosphors. Detailed examples are included. Example 3 for instance utilizes 2 parts by wt. ZnS activated by Cu and Al in amount 10<SP>-4</SP> g./g. of host and one weight part of Zn 2 SiO 4 activated by Mn in amount 2Î10<SP>-2</SP> grm. atom/mole. Higher colour purity may be achieved by combining two or more compositions.
GB27085/76A 1975-07-04 1976-06-29 Fluorescent compositions and lowvelocity electron excited fluorescent display devices utilizing the same Expired GB1502707A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8194875A JPS5210875A (en) 1975-07-04 1975-07-04 Luminous compositions
JP8194975A JPS5210876A (en) 1975-07-04 1975-07-04 Green luminous fluorescent display tube excited by electron beam of lo w velocity

Publications (1)

Publication Number Publication Date
GB1502707A true GB1502707A (en) 1978-03-01

Family

ID=26422929

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27085/76A Expired GB1502707A (en) 1975-07-04 1976-06-29 Fluorescent compositions and lowvelocity electron excited fluorescent display devices utilizing the same

Country Status (1)

Country Link
GB (1) GB1502707A (en)

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19960628