JPS57126041A - Electron emission substance - Google Patents

Electron emission substance

Info

Publication number
JPS57126041A
JPS57126041A JP1194781A JP1194781A JPS57126041A JP S57126041 A JPS57126041 A JP S57126041A JP 1194781 A JP1194781 A JP 1194781A JP 1194781 A JP1194781 A JP 1194781A JP S57126041 A JPS57126041 A JP S57126041A
Authority
JP
Japan
Prior art keywords
electron emission
substance
electrodes
light emission
tube
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.)
Pending
Application number
JP1194781A
Other languages
Japanese (ja)
Inventor
Keiji Watabe
Masato Saito
Masahiro Dobashi
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP1194781A priority Critical patent/JPS57126041A/en
Publication of JPS57126041A publication Critical patent/JPS57126041A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/14—Solid thermionic cathodes characterised by the material

Landscapes

  • Discharge Lamp (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

PURPOSE:An electron emission substance comprising dysprosium oxide and yttrium oxide for use in a discharge lamp. CONSTITUTION:1 is a light emission tube formed of transparent quartz glass, wherein mercury, starting argon gas and a mettalic halide are enclosed. 2a, 2b are electrodes disposed at the ends of the light emission tube so that the electrodes face each other, the electrodes being connected to external lead-in wires 4a, 4b via molybdenum foils 3a, 3b attached to the ends of said light emission tube 1. An electron emission substance 13 applied to the surfaces of an internal coil 11 and an external coil 12 wound on a member 10 forming the electrode, and allowed to stick to the surfaces with a heating process at high temperatures, comprises 0.5-20mol% dysprosium oxide and yttrium oxide. By using the electrodes containing the substance, no separation of the electron emission substance occurs during the time of which the tube is turned on and being operated. Thus it is possible to obtain a lamp having a long life and the capability of constant electron emission during its lifetime without luminous flux deteroration.
JP1194781A 1981-01-29 1981-01-29 Electron emission substance Pending JPS57126041A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1194781A JPS57126041A (en) 1981-01-29 1981-01-29 Electron emission substance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1194781A JPS57126041A (en) 1981-01-29 1981-01-29 Electron emission substance

Publications (1)

Publication Number Publication Date
JPS57126041A true JPS57126041A (en) 1982-08-05

Family

ID=11791827

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1194781A Pending JPS57126041A (en) 1981-01-29 1981-01-29 Electron emission substance

Country Status (1)

Country Link
JP (1) JPS57126041A (en)

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