GB1473307A - Impregnated cathode - Google Patents

Impregnated cathode

Info

Publication number
GB1473307A
GB1473307A GB4541173A GB4541173A GB1473307A GB 1473307 A GB1473307 A GB 1473307A GB 4541173 A GB4541173 A GB 4541173A GB 4541173 A GB4541173 A GB 4541173A GB 1473307 A GB1473307 A GB 1473307A
Authority
GB
United Kingdom
Prior art keywords
anode
cathode
metal
plate
impregnated
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.)
Expired
Application number
GB4541173A
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.)
PA Management Consultants Ltd
Original Assignee
PA Management Consultants 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 PA Management Consultants Ltd filed Critical PA Management Consultants Ltd
Priority to GB4541173A priority Critical patent/GB1473307A/en
Priority to ZA00746081A priority patent/ZA746081B/en
Priority to AU73745/74A priority patent/AU7374574A/en
Priority to BR7972/74A priority patent/BR7407972D0/en
Priority to IT7453225A priority patent/IT1035088B/en
Priority to JP49110076A priority patent/JPS5079290A/ja
Priority to FR7432466A priority patent/FR2246062B3/fr
Priority to DE19742446159 priority patent/DE2446159A1/en
Priority to NL7412862A priority patent/NL7412862A/en
Priority to ES430482A priority patent/ES430482A1/en
Publication of GB1473307A publication Critical patent/GB1473307A/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J45/00—Discharge tubes functioning as thermionic generators

Landscapes

  • Solid Thermionic Cathode (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

1473307 Metal vapour converter PA MANAGEMENT CONSULTANTS Ltd 20 Sept 1974 [28 Sept 1973] 45411/73 Heading H1D In a thermionic converter the contamination of the anode by metal from the impregnated cathode emitter is prevented by forming in the emitter surface a thin layer of metal having a work function higher than the ionization potential of the metal from the impregnant. In a hole 2 in asbestos plate 1, Mo bearer plate 6, alumina 9 coated towards fuel burner 11, carries porous sintered W cathode 7 impregnated with Ba-Ca aluminate Ba 2 CaAl 2 O 6 formed before impregnation by heating the mixed carbonates with alumina, the cathode surface being finally coated with 50 nm of Pt by sputtering or vacuum evaporation. Cu disc anode 5, blackened at the back or with radiating fins, is seated 1 mm from anode 7 in a shoulder of a ceramic ring 4 resting on step 3 of plate 1. The Cs atmosphere at 1 Torr is provided from a heated reservoir (not shown). The work function of Pt (5À4 eV), being higher than the ionization potential of Ba<SP>++</SP> (5À2 eV), allows a cloud of + ions to form in equilibrium with the cathode, preventing Ba from contaminating the anode.
GB4541173A 1973-09-28 1973-09-28 Impregnated cathode Expired GB1473307A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
GB4541173A GB1473307A (en) 1973-09-28 1973-09-28 Impregnated cathode
ZA00746081A ZA746081B (en) 1973-09-28 1974-09-25 Improved impregnated cathode
AU73745/74A AU7374574A (en) 1973-09-28 1974-09-26 Impregnated thermionie converter cathode
BR7972/74A BR7407972D0 (en) 1973-09-28 1974-09-26 IMPREGNATED THERMONIC CONVERTER CATODE
IT7453225A IT1035088B (en) 1973-09-28 1974-09-26 PEROPHECOMANETUS IN THE CATHODE FOR THE CONVERSION OF THE ELECTRIC GERCIA
JP49110076A JPS5079290A (en) 1973-09-28 1974-09-26
FR7432466A FR2246062B3 (en) 1973-09-28 1974-09-26
DE19742446159 DE2446159A1 (en) 1973-09-28 1974-09-27 SOAKED CATHODE FOR THERMIONIC CONVERTER
NL7412862A NL7412862A (en) 1973-09-28 1974-09-27 THERMIONIC CONVERTER CATHOD.
ES430482A ES430482A1 (en) 1973-09-28 1974-09-27 Impregnated cathode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4541173A GB1473307A (en) 1973-09-28 1973-09-28 Impregnated cathode

Publications (1)

Publication Number Publication Date
GB1473307A true GB1473307A (en) 1977-05-11

Family

ID=10437116

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4541173A Expired GB1473307A (en) 1973-09-28 1973-09-28 Impregnated cathode

Country Status (10)

Country Link
JP (1) JPS5079290A (en)
AU (1) AU7374574A (en)
BR (1) BR7407972D0 (en)
DE (1) DE2446159A1 (en)
ES (1) ES430482A1 (en)
FR (1) FR2246062B3 (en)
GB (1) GB1473307A (en)
IT (1) IT1035088B (en)
NL (1) NL7412862A (en)
ZA (1) ZA746081B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2491257A1 (en) * 1980-04-14 1982-04-02 Thermo Electron Corp LASER-DRIVEN HIGH DENSITY ELECTRON SOURCE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2491257A1 (en) * 1980-04-14 1982-04-02 Thermo Electron Corp LASER-DRIVEN HIGH DENSITY ELECTRON SOURCE

Also Published As

Publication number Publication date
FR2246062A1 (en) 1975-04-25
NL7412862A (en) 1975-04-02
ZA746081B (en) 1975-10-29
ES430482A1 (en) 1977-01-16
JPS5079290A (en) 1975-06-27
AU7374574A (en) 1976-04-01
FR2246062B3 (en) 1977-07-08
IT1035088B (en) 1979-10-20
BR7407972D0 (en) 1975-07-15
DE2446159A1 (en) 1975-04-03

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed