JPS579042A - Electrode for discharge lamp - Google Patents

Electrode for discharge lamp

Info

Publication number
JPS579042A
JPS579042A JP8305380A JP8305380A JPS579042A JP S579042 A JPS579042 A JP S579042A JP 8305380 A JP8305380 A JP 8305380A JP 8305380 A JP8305380 A JP 8305380A JP S579042 A JPS579042 A JP S579042A
Authority
JP
Japan
Prior art keywords
electrode
electron emission
subsistance
discharge lamp
sc2o3
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
JP8305380A
Other languages
Japanese (ja)
Inventor
Masato Saito
Keiji Watabe
Masahiro Dobashi
Keiji Fukuyama
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 JP8305380A priority Critical patent/JPS579042A/en
Publication of JPS579042A publication Critical patent/JPS579042A/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
    • H01J61/073—Main electrodes for high-pressure discharge lamps
    • H01J61/0735—Main electrodes for high-pressure discharge lamps characterised by the material of the electrode
    • H01J61/0737—Main electrodes for high-pressure discharge lamps characterised by the material of the electrode characterised by the electron emissive material

Landscapes

  • Discharge Lamp (AREA)

Abstract

PURPOSE:To obtain the considerably excellent starting characteristic and the flux maintaining factor by making the average grain size of the electron emission material for a discharge lamp electrode having the electron emission substance to be specific times that of the heat-resistant metal. CONSTITUTION:In an electron emission subsistance where the mixing ratio of W is higher than 50wt%, the compound such as Sc2O3 or Sc2WO6 produced through the reaction between Sc2O3 and W during the electrode heating process is reacted with W under high temperature during the lighting of lamp to form the free electron of Sc which will reach through the grain field of W to the surface of the emission subsistance to lower the work factor of the electrode. Consequently the average grain size of the electron emission subsistance is made to be 0.01-5 times that of the heat-resistanct metal. Consequently excellent starting characteristic and the deterioration characteristic is achieved resulting in a discharge lamp where there is no incomplete starting.
JP8305380A 1980-06-19 1980-06-19 Electrode for discharge lamp Pending JPS579042A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8305380A JPS579042A (en) 1980-06-19 1980-06-19 Electrode for discharge lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8305380A JPS579042A (en) 1980-06-19 1980-06-19 Electrode for discharge lamp

Publications (1)

Publication Number Publication Date
JPS579042A true JPS579042A (en) 1982-01-18

Family

ID=13791444

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8305380A Pending JPS579042A (en) 1980-06-19 1980-06-19 Electrode for discharge lamp

Country Status (1)

Country Link
JP (1) JPS579042A (en)

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