JPS6460938A - Cathode for electron tube - Google Patents

Cathode for electron tube

Info

Publication number
JPS6460938A
JPS6460938A JP21642787A JP21642787A JPS6460938A JP S6460938 A JPS6460938 A JP S6460938A JP 21642787 A JP21642787 A JP 21642787A JP 21642787 A JP21642787 A JP 21642787A JP S6460938 A JPS6460938 A JP S6460938A
Authority
JP
Japan
Prior art keywords
specific
metal element
main component
layer
small amount
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
JP21642787A
Other languages
Japanese (ja)
Inventor
Tadanori Taguchi
Yoshihiko Yamamoto
Isato Watabe
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 JP21642787A priority Critical patent/JPS6460938A/en
Priority to CN88106323A priority patent/CN1013159B/en
Priority to KR1019880011299A priority patent/KR890005806A/en
Publication of JPS6460938A publication Critical patent/JPS6460938A/en
Pending 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
    • H01J1/14—Solid thermionic cathodes characterised by the material
    • H01J1/142—Solid thermionic cathodes characterised by the material with alkaline-earth metal oxides, or such oxides used in conjunction with reducing agents, as an emissive material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2201/00—Electrodes common to discharge tubes
    • H01J2201/19—Thermionic cathodes

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

PURPOSE:To enhance the reliability by covering a body containing Ni as main component together with a small amount of a reductive element with an electron emitting substance layer in a specific composition, and thereby providing stable thermoelectron emitting characteristics for a long period of time. CONSTITUTION:A body 11 shall be in a composition containing Ni as main component and a small amount of reductive element. This body 11 is covered with a specific electron emitting substance layer 12 to manufacture cathode for electron tube. As main component this layer 12 contains oxide of alkali earth metal element incl. Ba. Also the layer 12 contains as aux. component a composite oxide 16 of a specific No.1 metal element and No.2 metal element. This specific No.1 metal element is at least one of Sc, Y, and lanthanid type rare earth elements. The specific No.2 metal element is at least one of the IVa, Va, VIa, VIIa, VIII groups and Si. Here Ba production at the interface is maintained.
JP21642787A 1987-09-01 1987-09-01 Cathode for electron tube Pending JPS6460938A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP21642787A JPS6460938A (en) 1987-09-01 1987-09-01 Cathode for electron tube
CN88106323A CN1013159B (en) 1987-09-01 1988-08-31 Cathode for electron tube
KR1019880011299A KR890005806A (en) 1987-09-01 1988-09-01 Cathode for electron tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21642787A JPS6460938A (en) 1987-09-01 1987-09-01 Cathode for electron tube

Publications (1)

Publication Number Publication Date
JPS6460938A true JPS6460938A (en) 1989-03-08

Family

ID=16688393

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21642787A Pending JPS6460938A (en) 1987-09-01 1987-09-01 Cathode for electron tube

Country Status (3)

Country Link
JP (1) JPS6460938A (en)
KR (1) KR890005806A (en)
CN (1) CN1013159B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100335865B1 (en) * 1999-06-22 2002-05-10 가네꼬 히사시 Cathode Subassembly And Color CRT Equipped Therewith
KR100338036B1 (en) * 1994-12-28 2002-11-30 삼성에스디아이 주식회사 Cathode as oxide and manufacturing method thereof
KR20190020063A (en) 2016-07-20 2019-02-27 쇼와 덴코 가부시키가이샤 Gas supply and gas supply method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100200661B1 (en) * 1994-10-12 1999-06-15 손욱 Cathode for electron tube
CN1056465C (en) * 1994-10-25 2000-09-13 电子工业部第十二研究所自动工程研究所 Laser-evaporated thin-film scandium series cathode and its preparation method
KR100297687B1 (en) * 1998-09-24 2001-08-07 김순택 Cathode used in an electron gun
US6882093B2 (en) * 2001-08-01 2005-04-19 Matsushita Electric Industrial Co., Ltd. Long-life electron tube device, electron tube cathode, and manufacturing method for the electron tube device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100338036B1 (en) * 1994-12-28 2002-11-30 삼성에스디아이 주식회사 Cathode as oxide and manufacturing method thereof
KR100335865B1 (en) * 1999-06-22 2002-05-10 가네꼬 히사시 Cathode Subassembly And Color CRT Equipped Therewith
KR20190020063A (en) 2016-07-20 2019-02-27 쇼와 덴코 가부시키가이샤 Gas supply and gas supply method

Also Published As

Publication number Publication date
CN1031776A (en) 1989-03-15
KR890005806A (en) 1989-05-17
CN1013159B (en) 1991-07-10

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