JPS5641667A - Electrode for discharge lamp - Google Patents

Electrode for discharge lamp

Info

Publication number
JPS5641667A
JPS5641667A JP11769079A JP11769079A JPS5641667A JP S5641667 A JPS5641667 A JP S5641667A JP 11769079 A JP11769079 A JP 11769079A JP 11769079 A JP11769079 A JP 11769079A JP S5641667 A JPS5641667 A JP S5641667A
Authority
JP
Japan
Prior art keywords
electron
electrode
substance
emitting
lanthanum
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
JP11769079A
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 JP11769079A priority Critical patent/JPS5641667A/en
Publication of JPS5641667A publication Critical patent/JPS5641667A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes

Landscapes

  • Discharge Lamp (AREA)

Abstract

PURPOSE:To enhance the electron-emitting ability of an electrode for a discharge lamp by employing lanthanum oxide and an oxide of rare-earth-metal of lanthanide series other than lanthanum to prepare an electron-emitting substance which is added to the electrode. CONSTITUTION:Either an electrode 2a or 2b of a luminous tube 1 which is installed in a metal-vapor discharge-lamp consists of a core 15 made of tungsten or the like, an inside coil 16 and an outside coil 17 which are coiled round the core 15, and an electron-emitting substance 18 which is stuck over the surfaces of the coils. Here, the electron-emitting substance 18 is prepared from lanthanum oxide which is added with 0.5-95mol% of an oxide of rare-earth-metal of lanthanide series other than lanthanum. As a result, the fusing point of the electron-emitting substance 18 is reduced, and the adhesiveness of the substance 18 to the electrodes is enhanced. Consequently, the separation of the substance 18 from the electrodes can be obviated, and the electron-emitting ability of the electrodes can be maintained for a long time.
JP11769079A 1979-09-13 1979-09-13 Electrode for discharge lamp Pending JPS5641667A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11769079A JPS5641667A (en) 1979-09-13 1979-09-13 Electrode for discharge lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11769079A JPS5641667A (en) 1979-09-13 1979-09-13 Electrode for discharge lamp

Publications (1)

Publication Number Publication Date
JPS5641667A true JPS5641667A (en) 1981-04-18

Family

ID=14717876

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11769079A Pending JPS5641667A (en) 1979-09-13 1979-09-13 Electrode for discharge lamp

Country Status (1)

Country Link
JP (1) JPS5641667A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63117069A (en) * 1986-11-05 1988-05-21 Kibun Kk Method of purifying carthamin

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63117069A (en) * 1986-11-05 1988-05-21 Kibun Kk Method of purifying carthamin

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