JPS56102033A - Hot cathode - Google Patents

Hot cathode

Info

Publication number
JPS56102033A
JPS56102033A JP435380A JP435380A JPS56102033A JP S56102033 A JPS56102033 A JP S56102033A JP 435380 A JP435380 A JP 435380A JP 435380 A JP435380 A JP 435380A JP S56102033 A JPS56102033 A JP S56102033A
Authority
JP
Japan
Prior art keywords
powder
melting point
metal
compound
high melting
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
JP435380A
Other languages
Japanese (ja)
Inventor
Sadakichi Hotta
Masanori Watanabe
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP435380A priority Critical patent/JPS56102033A/en
Priority to US06/187,701 priority patent/US4369392A/en
Priority to GB8029935A priority patent/GB2060991A/en
Publication of JPS56102033A publication Critical patent/JPS56102033A/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

Landscapes

  • Solid Thermionic Cathode (AREA)

Abstract

PURPOSE:To achieve the high current density electron emission under low temperature stably for long term, by pressure molding the mixture of specific amount of metal powder having high melting point, the powder of simple substance or compound of reductive element such as Al, Mg and the powder of alkali earth compound. CONSTITUTION:The mixture of metal powder having high melting point such as Ni of 71-81wt%, the powder of more than one of simple subsistence or compound of reductive element such as Al, W, Si, Mg, Co, Ti, Zr, and the powder of alkali earth metal such as carbonate is pressure molded independently or together with metal having high melting point such as Ni to form the emitter section. Consequently high current density electron emission of 1-1.5A/cm<2>, for example, can be achieved stably for long term with relatively low cathode temperature and it can be mass produced.
JP435380A 1979-09-20 1980-01-17 Hot cathode Pending JPS56102033A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP435380A JPS56102033A (en) 1980-01-17 1980-01-17 Hot cathode
US06/187,701 US4369392A (en) 1979-09-20 1980-09-16 Oxide-coated cathode and method of producing the same
GB8029935A GB2060991A (en) 1979-09-20 1980-09-16 Oxide-coated cathode and method of producing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP435380A JPS56102033A (en) 1980-01-17 1980-01-17 Hot cathode

Publications (1)

Publication Number Publication Date
JPS56102033A true JPS56102033A (en) 1981-08-15

Family

ID=11582036

Family Applications (1)

Application Number Title Priority Date Filing Date
JP435380A Pending JPS56102033A (en) 1979-09-20 1980-01-17 Hot cathode

Country Status (1)

Country Link
JP (1) JPS56102033A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4768946A (en) * 1985-05-08 1988-09-06 Matsushita Electric Industrial Co., Ltd. Mold clamping device for molding machines
JPH05266783A (en) * 1990-12-28 1993-10-15 Mitsubishi Electric Corp Cathode for electron tube
JPH0850849A (en) * 1994-05-31 1996-02-20 Nec Kansai Ltd Cathode member and electronic tube using it
WO2003015116A1 (en) * 2001-08-06 2003-02-20 Hamamatsu Photonics K.K. Sintering type cathode and production method therefor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4965174A (en) * 1972-10-25 1974-06-24
JPS535011A (en) * 1976-07-06 1978-01-18 Sony Corp Press cathode

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4965174A (en) * 1972-10-25 1974-06-24
JPS535011A (en) * 1976-07-06 1978-01-18 Sony Corp Press cathode

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4768946A (en) * 1985-05-08 1988-09-06 Matsushita Electric Industrial Co., Ltd. Mold clamping device for molding machines
JPH05266783A (en) * 1990-12-28 1993-10-15 Mitsubishi Electric Corp Cathode for electron tube
JPH0850849A (en) * 1994-05-31 1996-02-20 Nec Kansai Ltd Cathode member and electronic tube using it
WO2003015116A1 (en) * 2001-08-06 2003-02-20 Hamamatsu Photonics K.K. Sintering type cathode and production method therefor

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