JPS5641635A - Directly heated type oxide cathhod - Google Patents

Directly heated type oxide cathhod

Info

Publication number
JPS5641635A
JPS5641635A JP11606879A JP11606879A JPS5641635A JP S5641635 A JPS5641635 A JP S5641635A JP 11606879 A JP11606879 A JP 11606879A JP 11606879 A JP11606879 A JP 11606879A JP S5641635 A JPS5641635 A JP S5641635A
Authority
JP
Japan
Prior art keywords
substrate metal
oxide
powder
directly heated
heated type
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
JP11606879A
Other languages
Japanese (ja)
Other versions
JPS6343858B2 (en
Inventor
Seiji Kumada
Akira Misumi
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP11606879A priority Critical patent/JPS5641635A/en
Priority to GB8029361A priority patent/GB2059676B/en
Priority to US06/186,742 priority patent/US4446404A/en
Publication of JPS5641635A publication Critical patent/JPS5641635A/en
Publication of JPS6343858B2 publication Critical patent/JPS6343858B2/ja
Granted 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
    • H01J1/15—Cathodes heated directly by an electric current

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

PURPOSE:To improve the life of a cathode by baking powder of Co or Co-Ni on the part to be coated with an oxide of a substrte melt of alloy the main component of which is Ni and containing Zr as a reducing agent to prevent the oxide from peeling off. CONSTITUTION:Powder of Co or Co-Ni 4 is baked on the part of a substrate metal 1 to be coated with an oxide 3 for emission of electrons, the substrate metal 1 contains Zr as a reducing agent of a directly heated type oxide cathode and is constituted with alloy the main component of which is Ni. It is preferable that the substrate metal 1 contains 0.04-5wt% of Zr, and the Co-Ni powder contains Co in a proportion of not less than 80wt% and Ni in a proportion of not more than 20wt%. The coated amount of the powder of Co or Co-Ni on the substrate metal 1 is preferably 0.1-5mg/cm<2>. The substrate metal is preferably constituted with Ni as the main component, one or more of high melting point metals such as W, Mo, and Re, and Zr as a reducing agent.
JP11606879A 1979-09-12 1979-09-12 Directly heated type oxide cathhod Granted JPS5641635A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP11606879A JPS5641635A (en) 1979-09-12 1979-09-12 Directly heated type oxide cathhod
GB8029361A GB2059676B (en) 1979-09-12 1980-09-11 Oxide-coated cathodes
US06/186,742 US4446404A (en) 1979-09-12 1980-09-12 Directly heated oxide cathode and production thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11606879A JPS5641635A (en) 1979-09-12 1979-09-12 Directly heated type oxide cathhod

Publications (2)

Publication Number Publication Date
JPS5641635A true JPS5641635A (en) 1981-04-18
JPS6343858B2 JPS6343858B2 (en) 1988-09-01

Family

ID=14677907

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11606879A Granted JPS5641635A (en) 1979-09-12 1979-09-12 Directly heated type oxide cathhod

Country Status (1)

Country Link
JP (1) JPS5641635A (en)

Also Published As

Publication number Publication date
JPS6343858B2 (en) 1988-09-01

Similar Documents

Publication Publication Date Title
GB1496994A (en) Pastes for forming electrically conductive films on non-conductive substrates
US2996795A (en) Thermionic cathodes and methods of making
JPS54140453A (en) Oxide cathode for electron tube
GB816135A (en) Workable alloys of molybdenum and tungsten containing rhenium
JPS5641635A (en) Directly heated type oxide cathhod
GB586000A (en) Improvements in or relating to secondary electron emitting electrodes, and to electron discharge devices embodying such electrodes
GB538479A (en) Cathodes for electron discharge devices and alloys therefor
JPS5451459A (en) Cathode of electron tube
JPS5641636A (en) Directly heated type oxide cathode
US2586768A (en) Vacuum tube electrode element
JPS53116089A (en) Wiring constituent body
JPS5291358A (en) Direct heating cathode structure
JPS54131861A (en) Direct-heated cathode for electric discharge tube
JPS5471550A (en) Base metal material for direct heating oxide cathode
JPS5368161A (en) Manufacture for electron tube grid electrode
JPS5291356A (en) Direct heating cathode structure
JPS5291357A (en) Direct heating cathode structure
KR830000979B1 (en) Base metal plate materials for directly heated oxide cathode
GB526731A (en) Improvements in secondary emissive electrodes
GB850814A (en) Improvements in or relating to electron discharge tubes
JPS5362454A (en) Direct heating type cathode construction
JPS5521844A (en) Metal oxide cathode
FR2411483A1 (en) Oxide cathode with powder metallurgical nickel support - contg. reducing agent in inlets on surface is resistant to poisoning (BE 5.6.79)
JPS5521845A (en) Metal oxide cathode
JPS53119662A (en) Indirectly-heated cathode for electron tube