GB2003655A - Mounting electron emissive cathode bodies - Google Patents

Mounting electron emissive cathode bodies

Info

Publication number
GB2003655A
GB2003655A GB7831971A GB7831971A GB2003655A GB 2003655 A GB2003655 A GB 2003655A GB 7831971 A GB7831971 A GB 7831971A GB 7831971 A GB7831971 A GB 7831971A GB 2003655 A GB2003655 A GB 2003655A
Authority
GB
United Kingdom
Prior art keywords
electron emissive
lab6
emissive cathode
materials
cathode bodies
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
GB7831971A
Other versions
GB2003655B (en
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.)
OC Oerlikon Balzers AG
Original Assignee
Balzers AG
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 Balzers AG filed Critical Balzers AG
Publication of GB2003655A publication Critical patent/GB2003655A/en
Application granted granted Critical
Publication of GB2003655B publication Critical patent/GB2003655B/en
Expired 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
    • H01J1/148—Solid thermionic cathodes characterised by the material with compounds having metallic conductive properties, e.g. lanthanum boride, as an emissive material
    • 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

Abstract

The LaB6-emitter body 1 of an electron emissive cathode is connected to a carrier body 3 eg. a heater wire made of Ta, by means of a heat conducting auxiliary body 2 made of a third material. Particularly suitable as materials for the auxiliary body 2 are sintered materials of the class comprising carbides, nitrides and borides, since these materials do not adversely react with the LaB6 and provide good heat transfer and mechanical stability. The emitter body 1 may be rod- shaped and formed of monocrystalline or polycrystalline LaB6. <IMAGE>
GB7831971A 1977-09-02 1978-08-02 Cathode for electron emission Expired GB2003655B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1066577A CH617793A5 (en) 1977-09-02 1977-09-02

Publications (2)

Publication Number Publication Date
GB2003655A true GB2003655A (en) 1979-03-14
GB2003655B GB2003655B (en) 1982-05-26

Family

ID=4365548

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7831971A Expired GB2003655B (en) 1977-09-02 1978-08-02 Cathode for electron emission

Country Status (5)

Country Link
CH (1) CH617793A5 (en)
DE (2) DE7821817U1 (en)
FR (1) FR2402297A1 (en)
GB (1) GB2003655B (en)
NL (1) NL7808183A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2195820A (en) * 1986-09-29 1988-04-13 Balzers Hochvakuum Single crystal with resistance heating means

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6023456B2 (en) * 1978-11-01 1985-06-07 電気化学工業株式会社 Thermionic cathode device
FR2445605A1 (en) * 1978-12-27 1980-07-25 Thomson Csf DIRECT HEATING CATHODE AND HIGH FREQUENCY ELECTRONIC TUBE COMPRISING SUCH A CATHODE
DE3120454A1 (en) * 1981-05-22 1982-12-09 geb. Vlasova Margarita Sergeevna Moskva &Ccaron;upina Field emission cathode
JPS57196443A (en) * 1981-05-29 1982-12-02 Denki Kagaku Kogyo Kk Manufacture of hot cathode
JP6636472B2 (en) * 2017-02-28 2020-01-29 株式会社日立ハイテクノロジーズ Electron source and electron beam device using the same

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1061633A (en) * 1951-03-28 1954-04-14 Thomson Houston Comp Francaise Substances with high emissivity
GB1045396A (en) * 1965-07-23 1966-10-12 Standard Telephones Cables Ltd Thermionic cathodes
GB1210007A (en) * 1968-07-05 1970-10-28 Mullard Ltd Cathode
US3532923A (en) * 1969-03-17 1970-10-06 Ibm Pyrolytic graphite support for lanthanum hexaboride cathode emitter
US3803677A (en) * 1972-04-28 1974-04-16 Air Liquide Method for making cathodes for electron guns
JPS607335B2 (en) * 1974-11-29 1985-02-23 カナデイアン、パテンツ、アンド、デイベラツプメント、リミテツド thermionic emission cathode
JPS53128971A (en) * 1977-04-18 1978-11-10 Hitachi Ltd Manufacture of electron radiation cathode

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2195820A (en) * 1986-09-29 1988-04-13 Balzers Hochvakuum Single crystal with resistance heating means
FR2605455A1 (en) * 1986-09-29 1988-04-22 Balzers Hochvakuum MONOCRYSTAL WITH HEATING ELEMENTS, IN PARTICULAR THERMO-IONIC EMISSION CATHODE; METHOD FOR ANCHORING SUCH A HEATING ELEMENT IN A MONOCRYSTAL AND USE THEREOF

Also Published As

Publication number Publication date
DE7821817U1 (en) 1987-06-04
DE2832027B2 (en) 1981-07-09
GB2003655B (en) 1982-05-26
DE2832027C3 (en) 1987-05-07
FR2402297B1 (en) 1984-02-10
CH617793A5 (en) 1980-06-13
DE2832027A1 (en) 1979-03-15
NL7808183A (en) 1979-03-06
FR2402297A1 (en) 1979-03-30

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Legal Events

Date Code Title Description
PG Patent granted