JPS57132633A - Manufacturing method of impregnation type cathode - Google Patents

Manufacturing method of impregnation type cathode

Info

Publication number
JPS57132633A
JPS57132633A JP1574481A JP1574481A JPS57132633A JP S57132633 A JPS57132633 A JP S57132633A JP 1574481 A JP1574481 A JP 1574481A JP 1574481 A JP1574481 A JP 1574481A JP S57132633 A JPS57132633 A JP S57132633A
Authority
JP
Japan
Prior art keywords
metallic
wire
tungusten
combination
ribbon
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
JP1574481A
Other languages
Japanese (ja)
Inventor
Tadanori Taguchi
Toshiyuki Aida
Yukio Honda
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 JP1574481A priority Critical patent/JPS57132633A/en
Publication of JPS57132633A publication Critical patent/JPS57132633A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
    • H01J9/042—Manufacture, activation of the emissive part
    • H01J9/047—Cathodes having impregnated bodies

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)

Abstract

PURPOSE:To reduce operation temperature by making the spiral or ribbon- shaped porous metallic member of an impregnation type cathode to consist of a metallic fiber which is composed of very fine metallic wire of a high melting point or a combination of the metallic fiber and high melting point metallic powder. CONSTITUTION:A combination of tungusten powder with approximately 5mu and metallic fiber consisting of tungusten wire with approximately 7mu diameter is compressed and molded. Then a wire or ribbon whose surface is coated with copper by a combination of sintering, swaging, and rolling is obtained. Besides, this wire is wound round the groove 1 of a jig 3, and a spiral or direct heat heater type porous metallic member 2 is obtained by processing the ribbon in the direct heater molding and sintering it. Subsequently, an impregnation type cathode is completed by impregnating the empty hole of porous tungusten with electron emissive material. As a result, operation temperature can be reduced as compared with the conventional one.
JP1574481A 1981-02-06 1981-02-06 Manufacturing method of impregnation type cathode Pending JPS57132633A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1574481A JPS57132633A (en) 1981-02-06 1981-02-06 Manufacturing method of impregnation type cathode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1574481A JPS57132633A (en) 1981-02-06 1981-02-06 Manufacturing method of impregnation type cathode

Publications (1)

Publication Number Publication Date
JPS57132633A true JPS57132633A (en) 1982-08-17

Family

ID=11897265

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1574481A Pending JPS57132633A (en) 1981-02-06 1981-02-06 Manufacturing method of impregnation type cathode

Country Status (1)

Country Link
JP (1) JPS57132633A (en)

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