JPS5632642A - Manufacture of cathode for electron tube - Google Patents

Manufacture of cathode for electron tube

Info

Publication number
JPS5632642A
JPS5632642A JP10759279A JP10759279A JPS5632642A JP S5632642 A JPS5632642 A JP S5632642A JP 10759279 A JP10759279 A JP 10759279A JP 10759279 A JP10759279 A JP 10759279A JP S5632642 A JPS5632642 A JP S5632642A
Authority
JP
Japan
Prior art keywords
carbonate
sintered
powder
voids
alkaline earth
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
JP10759279A
Other languages
Japanese (ja)
Inventor
Kenichi Tsujikawa
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP10759279A priority Critical patent/JPS5632642A/en
Publication of JPS5632642A publication Critical patent/JPS5632642A/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

Landscapes

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

Abstract

PURPOSE:To obtain a cathode with excellent performances in gas resistance, ion impulsive character, high current density, and the like, by adding the carbonate of Ba or the like to Ni powder, heating it under specific conditions, obtaining a sintered porous body and filling the carbonate of Ba or the like into its voids. CONSTITUTION:To Ni powder a desired amount of an alkaline earth carbonate is added, and the resulting mixture is heated at 1,000-1,300 deg.C in the vacuum or hydrogen atmosphere to obtain a sintered porous body of Ni2 and alkaline earth oxide 3, and its voids is filled with the alkaline earth carbonate. For instance, to carbonyl nickel powder, Ni powder containing a small amount of a reducing agent like Mg and 15wt% of a powdery carbonate of Ba, Sr or the like is mixed to perform a pressure molding. The thus-molded body is sintered under the above described conditions while silghtly urging it against an Ni base board metal 1. Then, the carbonate of Ba, Sr or the like formed into a state of suspension by butyl acetate together with nitrocellulose is blown against the thus molded sintered body so as to fill up the voids of the sintered body with the carbonate 4.
JP10759279A 1979-08-23 1979-08-23 Manufacture of cathode for electron tube Pending JPS5632642A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10759279A JPS5632642A (en) 1979-08-23 1979-08-23 Manufacture of cathode for electron tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10759279A JPS5632642A (en) 1979-08-23 1979-08-23 Manufacture of cathode for electron tube

Publications (1)

Publication Number Publication Date
JPS5632642A true JPS5632642A (en) 1981-04-02

Family

ID=14463056

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10759279A Pending JPS5632642A (en) 1979-08-23 1979-08-23 Manufacture of cathode for electron tube

Country Status (1)

Country Link
JP (1) JPS5632642A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1009716C2 (en) * 1997-07-23 1999-03-12 Nec Corp A method of manufacturing a cathode member and electron tube equipped therewith.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1009716C2 (en) * 1997-07-23 1999-03-12 Nec Corp A method of manufacturing a cathode member and electron tube equipped therewith.

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