GB1240050A - Improvements in or relating to cathodes for electrical discharge vessels - Google Patents

Improvements in or relating to cathodes for electrical discharge vessels

Info

Publication number
GB1240050A
GB1240050A GB5991369A GB5991369A GB1240050A GB 1240050 A GB1240050 A GB 1240050A GB 5991369 A GB5991369 A GB 5991369A GB 5991369 A GB5991369 A GB 5991369A GB 1240050 A GB1240050 A GB 1240050A
Authority
GB
United Kingdom
Prior art keywords
osmium
tungsten
layer
plate
dec
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
GB5991369A
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of GB1240050A publication Critical patent/GB1240050A/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
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/28—Dispenser-type cathodes, e.g. L-cathode
    • 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
    • H01J9/042—Manufacture, activation of the emissive part
    • H01J9/047—Cathodes having impregnated bodies

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Solid Thermionic Cathode (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

1,240,050. Cathode materials and processing. SIEMENS A.G. 9 Dec., 1969 [10 Dec., 1968], No. 59913/69. Addition to 1,143,865. Heading H1D. In a modification of the manufacture of a dispenser cathode as disclosed in Specification 1,143,865, in which a layer of osmium is deposited on a porous tungsten carrier plate by chemical deposition from a solution of a compound of osmium, e.g. OsO 4 , followed by reduction and sintering-on of the deposited material in a hydrogen atmosphere, the reduced osmium layer on the tungsten plate is annealed at 1200‹ Œ 200‹ C. for a time sufficient to ensure conversion of the osmium layer to an alloy containing 70 atom per cent osmium and 30 atom per cent tungsten. A freshly reduced tungsten plate may have a minimum quantity of 1À0 mg. Os for a 500 mg. tungsten plate and the diffusion annealing may last for 15 to 60 minutes.
GB5991369A 1966-01-19 1969-12-09 Improvements in or relating to cathodes for electrical discharge vessels Expired GB1240050A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DES0101520 1966-01-19
DE19681813767 DE1813767B2 (en) 1966-01-19 1968-12-10 PROCESS FOR PRODUCING A STORAGE CATHODE FOR ELECTRIC DISCHARGE VESSELS

Publications (1)

Publication Number Publication Date
GB1240050A true GB1240050A (en) 1971-07-21

Family

ID=25756571

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5991369A Expired GB1240050A (en) 1966-01-19 1969-12-09 Improvements in or relating to cathodes for electrical discharge vessels

Country Status (2)

Country Link
DE (1) DE1813767B2 (en)
GB (1) GB1240050A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0019992A1 (en) * 1979-05-29 1980-12-10 Thorn Emi-Varian Limited Thermionic electron emitters and methods of making them

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0019992A1 (en) * 1979-05-29 1980-12-10 Thorn Emi-Varian Limited Thermionic electron emitters and methods of making them

Also Published As

Publication number Publication date
DE1813767A1 (en) 1970-09-03
DE1813767B2 (en) 1971-09-30

Similar Documents

Publication Publication Date Title
ES8300225A1 (en) Method of preparation of electrodes for use in electrochemical cells.
GB1207648A (en) Improvements in and relating to rotary targets for x-ray tubes
GB1385350A (en) X-ray tube target and x-ray tubes utilising such a target
GB949151A (en) Cold emission point type cathodes
GB831133A (en) Improvements relating to thermionic cathodes
Young Evolution of gases and ions from different anodes under electron bombardment
GB1525005A (en) Thermionic reaction cathode
Cyr et al. Electrochemical studies of the reduction of dodecacarbonyltriruthenium
GB1240050A (en) Improvements in or relating to cathodes for electrical discharge vessels
JPS54140453A (en) Oxide cathode for electron tube
GB1244618A (en) A method of forming a metal contact on an element and a vacuum deposition system that may be used in performing this method
Rach et al. XPS analysis of the oxide layer formed on Pt by anodization in sulfuric acid
GB853852A (en) Improvements in or relating to methods of manufacturing electrically conductive films
GB1155159A (en) Improvements in or relating to Indirectly Heated Dispenser Cathodes for Electrical Discharge Vessels
GB1175486A (en) Improvements in or relating to Dispenser Cathodes
GB1328301A (en) Process for the preparation of dehydrogenation catalyst and the use thereof
GB1177012A (en) Tungsten-Containing Electrode
US3403282A (en) Dispenser type cathode
GB1170880A (en) Improvements in or relating to thorium-film thermionic cathodes for electrical discharge vessels.
GB1169029A (en) Anode Plate for X-Ray Tubes
US2765418A (en) Geiger-muller counter tube
US1835026A (en) Electrode material
Denaro et al. Glow-discharge electrolysis of alkaline ferrocyanide solutions
GB1303143A (en)
GB983105A (en) Thermionic converter