GB1074776A - Thermionic tube cathodes - Google Patents
Thermionic tube cathodesInfo
- Publication number
- GB1074776A GB1074776A GB35678/64A GB3567864A GB1074776A GB 1074776 A GB1074776 A GB 1074776A GB 35678/64 A GB35678/64 A GB 35678/64A GB 3567864 A GB3567864 A GB 3567864A GB 1074776 A GB1074776 A GB 1074776A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coated
- nickel
- oxide
- stream
- hours
- 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
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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/442—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating using fluidised bed process
-
- 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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
Abstract
<PICT:1074776/C6-C7/1> Discrete particles of an alkaline earth metal oxide or carbonate are coated with at least one of the metals Ni, W, Mo, Co, for use in thermionic cathodes. In particular, coprecipitated bariumstrontium oxide, ball-milled to a maximum particle size of 37 m , may be coated with nickel in a fluidized bed system. As shown, a stream of hydrogen, nitrogen or argon, saturated with carbonyl nickel derived from bubbles 20, is passed through fluidization column 11 which is heated to 100 DEG C. for 20 hours. The coated particles may contain 14% by weight nickel and 86% oxide. Alternatively, a stream of hydrogen containing carbonyl nickel vapour may be passed through a suspension of barium-strontium carbonate powder in amyl acetate, which is agitated by a magnetic stirrer and maintained at 80 - 90 DEG C. for 22 hours by an oil bath, Fig. 2 (not shown).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US31004063A | 1963-09-19 | 1963-09-19 | |
US520488A US3384511A (en) | 1963-09-19 | 1966-01-13 | Cathode structures utilizing metal coated powders |
US683378A US3404034A (en) | 1963-09-19 | 1967-11-15 | Preparation of metal-coated powders and cathode structures |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1074776A true GB1074776A (en) | 1967-07-05 |
Family
ID=27405432
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB35678/64A Expired GB1074776A (en) | 1963-09-19 | 1964-09-01 | Thermionic tube cathodes |
Country Status (5)
Country | Link |
---|---|
US (2) | US3384511A (en) |
BE (1) | BE652784A (en) |
DE (1) | DE1255207B (en) |
GB (1) | GB1074776A (en) |
NL (1) | NL142272B (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3700857A (en) * | 1971-04-14 | 1972-10-24 | Bell Telephone Labor Inc | Electrical resistance heater |
GB1411500A (en) * | 1972-09-12 | 1975-10-29 | Siemens Ag | Preparation of a catalytic material |
US4264648A (en) * | 1976-09-10 | 1981-04-28 | Xerox Corporation | Low specific gravity magnetic carrier materials |
US4267247A (en) * | 1976-09-10 | 1981-05-12 | Xerox Corporation | Low specific gravity magnetic carrier materials |
EP0641007A3 (en) * | 1993-08-31 | 1995-06-21 | Samsung Display Devices Co Ltd | Direct-heating-type dispenser cathode structure. |
US11167260B2 (en) * | 2013-06-28 | 2021-11-09 | Korea Institute Of Energy Research | Oxygen selective adsorbent for easy desorption and preparation method thereof |
CN116671270A (en) | 2020-12-29 | 2023-08-29 | 3M创新有限公司 | Electromagnetic absorption composite material |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2698810A (en) * | 1950-08-25 | 1955-01-04 | Nat Res Corp | Coating process |
US2798051A (en) * | 1953-05-19 | 1957-07-02 | Universal Oil Prod Co | Method of manufacturing a supported catalyst |
BE531122A (en) * | 1953-08-14 | |||
US2858470A (en) * | 1955-02-02 | 1958-10-28 | Bell Telephone Labor Inc | Cathode for electron discharge devices |
US2839423A (en) * | 1955-06-03 | 1958-06-17 | Ohio Commw Eng Co | Method of coating alkaline earth metal with protective metal |
US2874077A (en) * | 1957-10-23 | 1959-02-17 | Rauland Corp | Thermionic cathodes |
US2945295A (en) * | 1957-12-20 | 1960-07-19 | Westinghouse Electric Corp | High temperature metallic joint |
US3023491A (en) * | 1958-01-02 | 1962-03-06 | Union Carbide Corp | Use of dioxane as a solvent for vapor plating molybdenum, tungsten and chromium from their hexacarbonyls |
US2985509A (en) * | 1958-02-24 | 1961-05-23 | Union Carbide Corp | Method of recovering metal carbonyls from gases |
US3088851A (en) * | 1959-08-06 | 1963-05-07 | Philips Corp | Method of manufacturing oxide cathodes and cathodes manufactured by such methods |
US3155864A (en) * | 1960-03-21 | 1964-11-03 | Gen Electric | Dispenser cathode |
-
1964
- 1964-08-19 DE DEW37408A patent/DE1255207B/en active Pending
- 1964-08-25 NL NL646409823A patent/NL142272B/en not_active IP Right Cessation
- 1964-09-01 GB GB35678/64A patent/GB1074776A/en not_active Expired
- 1964-09-07 BE BE652784D patent/BE652784A/xx unknown
-
1966
- 1966-01-13 US US520488A patent/US3384511A/en not_active Expired - Lifetime
-
1967
- 1967-11-15 US US683378A patent/US3404034A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
NL142272B (en) | 1974-05-15 |
US3384511A (en) | 1968-05-21 |
DE1255207B (en) | 1967-11-30 |
US3404034A (en) | 1968-10-01 |
NL6409823A (en) | 1965-03-22 |
BE652784A (en) | 1964-12-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1291976A (en) | Improvements relating to the sorption of hydrogen | |
GB1182150A (en) | Alkali Metal Vapour Dispensers. | |
GB1074776A (en) | Thermionic tube cathodes | |
GB1331284A (en) | Hydrogen pumps and refirgeration apparatus employing same | |
GB1148165A (en) | Improvements in methods of making alloy powders and in the corresponding powders | |
GB1332398A (en) | Multi-converter thermionic energy module | |
GB1289940A (en) | ||
GB1218079A (en) | Improvements in x-ray tubes | |
GB947281A (en) | Improvements in or relating to thermionic converters | |
GB1265768A (en) | ||
US3801700A (en) | Preparation of 238pu16o2 | |
US2706554A (en) | Getter assembly | |
GB598653A (en) | Improvements in or relating to the coating of metals with metals and alloys | |
GB1285730A (en) | Improvements in or relating to sintered tungsten alloys | |
GB924595A (en) | Method of manufacturing cathodes | |
GB1076229A (en) | Cathodes | |
GB999226A (en) | Processing refractory metals | |
GB1261399A (en) | Process for preparing supported permanently-magnetizable metals or alloys | |
GB561592A (en) | Improvements in or relating to alloys particularly for the production of alloy steels | |
Tanaka | Distribution and lifetime of cosmic-ray electrons in the galaxy | |
GB542410A (en) | Improvements in method of production of powdered alloys or carbides | |
GB1001186A (en) | Improvements in or relating to powder metallurgy | |
GB1256887A (en) | ||
GB797842A (en) | Improvements in or relating to the manufacture of electric discharge devices | |
GB838442A (en) | Improvements relating to neutron-absorbing bodies for use in nuclear reactors |