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JPS563961A - Electrode for discharge lamp - Google Patents

Electrode for discharge lamp

Info

Publication number
JPS563961A
JPS563961A JP7886979A JP7886979A JPS563961A JP S563961 A JPS563961 A JP S563961A JP 7886979 A JP7886979 A JP 7886979A JP 7886979 A JP7886979 A JP 7886979A JP S563961 A JPS563961 A JP S563961A
Authority
JP
Japan
Prior art keywords
oxide
lessen
yttrium oxide
lamp
electrode
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.)
Granted
Application number
JP7886979A
Other languages
Japanese (ja)
Other versions
JPS6226549B2 (en
Inventor
Keiji Watabe
Masato Saito
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 JP7886979A priority Critical patent/JPS563961A/en
Priority to DE2951741A priority patent/DE2951741C2/en
Priority to NLAANVRAGE7909301,A priority patent/NL187876C/en
Priority to US06/108,173 priority patent/US4319158A/en
Publication of JPS563961A publication Critical patent/JPS563961A/en
Publication of JPS6226549B2 publication Critical patent/JPS6226549B2/ja
Granted 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 lower the starting voltage of lamp as well as lessen the blacking of tube end portion by using an electron-radiating substance containing alkaline earth metal oxides including at least barium oxide, lanthanum oxide, and yttrium oxide. CONSTITUTION:An electrode for discharge lamp is formed by coating an electrode base with an electron-radiating substance containing alkaline earth metal oxides including at least barium oxide, lanthanum oxide, and yttrium oxide. In this case, the preferred molar ratio of lanthanum oxide to yttrium oxide is 1:9 to 19:1, and also the whole amount of these is 1 to 30mol%. The combined use of lanthanum oxide with yttrium oxide having a high heat resistance even when used solely both forming mixed crystals or double compound which serves to enhance the radiation of electrons enables the starting voltage of lamp to lower, the deterioration of luminous flux to lessen, and the blacking of the tube end portion to lessen.
JP7886979A 1978-12-29 1979-06-22 Electrode for discharge lamp Granted JPS563961A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP7886979A JPS563961A (en) 1979-06-22 1979-06-22 Electrode for discharge lamp
DE2951741A DE2951741C2 (en) 1978-12-29 1979-12-21 Electrode for a discharge lamp
NLAANVRAGE7909301,A NL187876C (en) 1978-12-29 1979-12-22 ELECTRODE FOR A GAS DISCHARGE LAMP.
US06/108,173 US4319158A (en) 1978-12-29 1979-12-28 Electrode for discharge lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7886979A JPS563961A (en) 1979-06-22 1979-06-22 Electrode for discharge lamp

Publications (2)

Publication Number Publication Date
JPS563961A true JPS563961A (en) 1981-01-16
JPS6226549B2 JPS6226549B2 (en) 1987-06-09

Family

ID=13673823

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7886979A Granted JPS563961A (en) 1978-12-29 1979-06-22 Electrode for discharge lamp

Country Status (1)

Country Link
JP (1) JPS563961A (en)

Also Published As

Publication number Publication date
JPS6226549B2 (en) 1987-06-09

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