GB728181A - Secondary electron emitter - Google Patents
Secondary electron emitterInfo
- Publication number
- GB728181A GB728181A GB10362/53A GB1036253A GB728181A GB 728181 A GB728181 A GB 728181A GB 10362/53 A GB10362/53 A GB 10362/53A GB 1036253 A GB1036253 A GB 1036253A GB 728181 A GB728181 A GB 728181A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alloy
- magnesium
- silver
- oxygen
- free
- 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
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 4
- 229910052760 oxygen Inorganic materials 0.000 abstract 4
- 239000001301 oxygen Substances 0.000 abstract 4
- 229910045601 alloy Inorganic materials 0.000 abstract 3
- 239000000956 alloy Substances 0.000 abstract 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- 229910052749 magnesium Inorganic materials 0.000 abstract 2
- 239000011777 magnesium Substances 0.000 abstract 2
- 229910052709 silver Inorganic materials 0.000 abstract 2
- 239000004332 silver Substances 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 229910000861 Mg alloy Inorganic materials 0.000 abstract 1
- 150000001298 alcohols Chemical class 0.000 abstract 1
- 239000001569 carbon dioxide Substances 0.000 abstract 1
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 230000002939 deleterious effect Effects 0.000 abstract 1
- ZWWCURLKEXEFQT-UHFFFAOYSA-N dinitrogen pentaoxide Chemical compound [O-][N+](=O)O[N+]([O-])=O ZWWCURLKEXEFQT-UHFFFAOYSA-N 0.000 abstract 1
- 239000007772 electrode material Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 abstract 1
- 239000000395 magnesium oxide Substances 0.000 abstract 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract 1
- SJCKRGFTWFGHGZ-UHFFFAOYSA-N magnesium silver Chemical compound [Mg].[Ag] SJCKRGFTWFGHGZ-UHFFFAOYSA-N 0.000 abstract 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000007800 oxidant agent Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 239000002344 surface layer Substances 0.000 abstract 1
Classifications
-
- 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
- H01J9/12—Manufacture of electrodes or electrode systems of photo-emissive cathodes; of secondary-emission electrodes
- H01J9/125—Manufacture of electrodes or electrode systems of photo-emissive cathodes; of secondary-emission electrodes of secondary emission electrodes
-
- 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
- H01J1/32—Secondary-electron-emitting electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2201/00—Electrodes common to discharge tubes
- H01J2201/32—Secondary emission electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Cold Cathode And The Manufacture (AREA)
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
728,181. Electrode materials and processing. RADIO CORPORATION OF AMERICA. April 15, 1953 [May 1, 1952], No. 10362/53. Drawings to Specification. Class 39 (1). A secondary emitting electrode consisting of a silver-magnesium alloy, which has a surface layer of magnesium oxide formed by heating in an atmosphere of water vapour or other oxidizing agent which does not diffuse into the alloy as readily as free oxygen, is then further treated by heating in free oxygen. The oxygen diffuses into the alloy and " freezes " by oxidation the free magnesium therein, so that it does not evaporate with deleterious effects during operation. The treatment can be carried out at temperatures from about 500 C. almost up to the melting point of silver (960 C.) for periods from 5 minutes up to half an hour or more, depending on temperature and pressure. The oxygen pressure is not critical, and can vary from a few mm. to several atmospheres. A suitable alloy consists of 98.3 per cent silver and 1.7 per cent magnesium. Other suitable agents for forming the oxide layer besides water vapour are carbon dioxide, nitrogen pentoxide, or alcohols. A suitable technique is described. Fig. 4 (not shown) illustrates graphically the improved emission resulting from the processing according to the invention.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US285466A US2784123A (en) | 1952-05-01 | 1952-05-01 | Secondary electron emitter and process of preparing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB728181A true GB728181A (en) | 1955-04-13 |
Family
ID=23094351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB10362/53A Expired GB728181A (en) | 1952-05-01 | 1953-04-15 | Secondary electron emitter |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US2784123A (en) |
| BE (1) | BE519545A (en) |
| DE (1) | DE1012698B (en) |
| FR (1) | FR1072940A (en) |
| GB (1) | GB728181A (en) |
| NL (1) | NL94756C (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2825668A (en) * | 1956-03-20 | 1958-03-04 | Jack F Koons Jr | Process of making a plate oxide rectifier |
| US2902417A (en) * | 1956-09-19 | 1959-09-01 | Ibm | Application of solid lubricant coatings to surfaces |
| US2934670A (en) * | 1956-11-05 | 1960-04-26 | Columbia Broadcasting Syst Inc | Electron tubes and method of making same |
| CA617300A (en) * | 1956-12-26 | 1961-03-28 | Wargo Peter | Long-life rugged storage structure for electronic tubes |
| DE1162854B (en) * | 1960-10-10 | 1964-02-13 | L Air Liquide Sa Pour L Expl D | Thermal insulation for the bottom of cylindrical liquid gas containers |
| US3216824A (en) * | 1961-07-03 | 1965-11-09 | Commissariat Energie Atomique | Preparation of materials of composite structure |
| US3450574A (en) * | 1966-11-14 | 1969-06-17 | Northern Electric Co | Method of coating refractory wares with magnesia |
| JPS5316073B2 (en) * | 1973-11-09 | 1978-05-29 | ||
| US4088510A (en) * | 1976-02-19 | 1978-05-09 | Rca Corporation | Magnesium oxide dynode and method of preparation |
| DE3215314C2 (en) * | 1982-04-23 | 1984-12-06 | M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8000 München | Process for the production of oxide layers on a titanium-based alloy surface |
| FR2506518A1 (en) * | 1981-05-20 | 1982-11-26 | Labo Electronique Physique | ELECTRON MULTIPLIER STRUCTURE COMPRISING A MICROCHANNEL WAFER MULTIPLIER WITH A DYNODE AMPLIFIER STAGE, MANUFACTURING METHOD AND USE IN A PHOTOELECTRIC TUBE |
| JP3129096B2 (en) * | 1994-08-29 | 2001-01-29 | 三菱マテリアル株式会社 | Corrosion resistant film and corrosion resistant composite structure for Ag surface protection |
| CN104278230A (en) * | 2014-09-05 | 2015-01-14 | 兰州空间技术物理研究所 | Preparation method of Ag-Mg alloy type MgO film for high-energy particle bombardment |
| CN109346390A (en) * | 2018-08-31 | 2019-02-15 | 湖北汉光科技股份有限公司 | The production method of the secondary emitters of cesium beam tube electron multiplier |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2156262A (en) * | 1932-12-27 | 1939-05-02 | Colin G Fink | Process of treating metal articles to alloy constituent metals |
| BE434657A (en) * | 1937-07-14 | |||
| BE433432A (en) * | 1938-03-25 | |||
| US2373937A (en) * | 1940-03-21 | 1945-04-17 | Magnesium Elektron Ltd | Process of coating magnesium and magnesium alloys |
| US2393803A (en) * | 1945-01-27 | 1946-01-29 | Rca Corp | Method of making long life secondary electron emitters |
| US2447038A (en) * | 1945-10-31 | 1948-08-17 | Raytheon Mfg Co | Cathode structure |
| BE474312A (en) * | 1946-04-06 | |||
| US2477279A (en) * | 1946-09-11 | 1949-07-26 | Hanovia Chemical & Mfg Co | Electrical discharge device |
| US2620287A (en) * | 1949-07-01 | 1952-12-02 | Bramley Jenny | Secondary-electron-emitting surface |
-
0
- BE BE519545D patent/BE519545A/xx unknown
- NL NL94756D patent/NL94756C/xx active
-
1952
- 1952-05-01 US US285466A patent/US2784123A/en not_active Expired - Lifetime
-
1953
- 1953-03-13 FR FR1072940D patent/FR1072940A/en not_active Expired
- 1953-04-15 GB GB10362/53A patent/GB728181A/en not_active Expired
- 1953-04-23 DE DER11506A patent/DE1012698B/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| BE519545A (en) | |
| DE1012698B (en) | 1957-07-25 |
| US2784123A (en) | 1957-03-05 |
| FR1072940A (en) | 1954-09-16 |
| NL94756C (en) |
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