PL130098B2 - Grid of high-power tube - Google Patents
Grid of high-power tube Download PDFInfo
- Publication number
- PL130098B2 PL130098B2 PL23438281A PL23438281A PL130098B2 PL 130098 B2 PL130098 B2 PL 130098B2 PL 23438281 A PL23438281 A PL 23438281A PL 23438281 A PL23438281 A PL 23438281A PL 130098 B2 PL130098 B2 PL 130098B2
- Authority
- PL
- Poland
- Prior art keywords
- grid
- emission
- coated
- mesh
- palladium
- Prior art date
Links
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 7
- 229910052737 gold Inorganic materials 0.000 claims description 7
- 239000010931 gold Substances 0.000 claims description 7
- 229910052763 palladium Inorganic materials 0.000 claims description 7
- 239000002296 pyrolytic carbon Substances 0.000 claims description 6
- 150000002739 metals Chemical class 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 2
- 238000000576 coating method Methods 0.000 description 9
- 239000011248 coating agent Substances 0.000 description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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
- H01J1/46—Control electrodes, e.g. grid; Auxiliary electrodes
- H01J1/48—Control electrodes, e.g. grid; Auxiliary electrodes characterised by the material
Landscapes
- Electrodes For Cathode-Ray Tubes (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Solid Thermionic Cathode (AREA)
Description
Przedmiotem wynalazku jest siatka elektronowych lamp mocy z pokryciem tlumiacym niepozadana emisje cieplna siatki.Tlumienie emisji siatki jest szczególnie wazne dla lamp z katoda tlenkowa, w których juz podczas ich wytwa¬ rzania wystepuje wewnatrz lampy przenoszenie znacznych ilosci czasteczek emitowanych z katody na siatke, co wobec wystarczajaco wysokiej temperatury roboczej siatki umozliwiajej emisje.Dotychczas do tlumienia niepozadanej emisji siatek lamp mocy, wykonywanych zazwyczaj z materialów trudnotopliwych, takich jak molibden, wolfram lub tantal, stosowano rózne rodzaje pokryc antyemisyjnych, za¬ wierajacych glównie tytan, cyrkon, hafn, tantal, zloto, pallad i pyrolityczny wegiel.Pokrycie antyemisyjne siatek zawierajace tytan i cyrkon nie przyniosly w praktyce dobrych rezultatów, po¬ mimo ze takie pokrycia skutkiem ciemnej barwy, obnizaja temperature pracy siatki, przy czym wady te wynika¬ ja ze znacznej ziarnistosci i niedostatecznej przyczepnosci pokrycia.Pokrycia antyemisyjne oparte na zlocie i palladzie maja znakomite wlasciwosci zas wada ich polega na nis¬ kiej dopuszczalnej temperaturze powleczonej nimi siatki. Przy przekraczaniu tej dopuszczalnej temperatuiy, tak podczas wytwarzania lampy, jak i podczas jej pracy, nastepuje odparowanie zlota, palladu, lub ich kombinacji i utrata przez siatke wlasnosci antyemisyjnych, a czesto takze uszkodzenie katody.Pokrycia siatki na bazie pyrolitycznego wegla sa stabilne cieplnie równiez w wysokiej temperaturze, a ich cie¬ mny kolor przyczynia sie do obnizenia temperatury pracy siatki. Tlumienie jednak emisji przez takie pokrycie nie jest zadawalajace.Wszystkie wymienione pokrycia sa nanoszone jednolicie na wewnetrzna i zewnetrzna powierzchnie siatki, przy czym przez powierzchnie wewnetrzna rozumie sie powierzchnie zwrócona ku katodzie, a przez powierzch¬ nie zewnetrzna — powierzchnie zwrócona ku anodzie lampy.Siatka elektronowych lamp mocy wedlug wynalazku charakteryzuje sie tym, ze wewnetrzna powierzchnia siatki jest pokryta metalem o wlasciwosciach antyemisyjnych, albo kombinacja tych metali, a zewnetrzna po-2 130 098 wierzchnia siatki jest pokryta weglem pyrolitycznym. Korzystnie metal do pokrycia siatki stanowi zloto i pallad.Zaleta wynalazku polega na tym, ze pokrycie ze zlota, palladu, lub innego antyemisyjnego matalu naniesio¬ ne na wewnetrzna powierzchnie ma znakomite wlasciwosci antyemisyjne i sluzy oprócz tego jako reflektor pro¬ mieniowania cieplnego katody, podczas gdy zewnetrzna, pokryta pyrolitycznym weglem zwieksza wytrzyma¬ losc mechaniczna siatki w wysokiej temperaturze, przyczyniajac sie oprócz tego do obnizenia temperatury przez swa ciemna barwe.Zastrzezenia patentowe 1. Siatka elektronowych lamp mocy, znamienna tym, ze wewnetrzna powierzchnia siatki jest pokry¬ ta metalem o wlasciwosciach antyemisyjnych, lub kombinacja takich metali, a jej zewnetrzna powierzchnia jest pokryta weglem pyrolitycznym. 2. Siatka wedlug zastrz. 1,znamienna tym, ze powierzchnia siatki jest pokryta zlotem, palladem lub kombinacja tych metali antyemisyjnych.Pracownia Poligraficzna UP PRL. Naklad 100 egz.Cena 100 zl PLThe subject of the invention is a grid of power electron tubes with a coating suppressing the unwanted thermal emission of the grid. The suppression of the grid emission is particularly important for lamps with an oxide cathode, in which already during their production a significant amount of particles emitted from the cathode onto the grid occurs inside the lamp, a sufficiently high operating temperature of the mesh allows its emission. Until now, to suppress the undesirable emission of power lamp grids, usually made of refractory materials such as molybdenum, tungsten or tantalum, various types of anti-emission coatings were used, consisting mainly of titanium, zirconium, hafnium, tantalum, gold , palladium and pyrolytic carbon. The anti-emission coating of the meshes containing titanium and zirconium did not bring good results in practice, despite the fact that such coatings due to the dark color, reduce the operating temperature of the mesh, and these drawbacks result from the considerable graininess and insufficient adhesion of the coating. Anti-emission coverings They are based on gold and palladium have excellent properties, and their disadvantage is the low permissible temperature of the mesh coated with them. When this permissible temperature is exceeded, both during the manufacture of the lamp and during its operation, the gold, palladium or their combinations evaporate and the mesh loses its anti-emission properties, and often also breaks the cathode. Grid coatings based on pyrolytic carbon are also heat stable in high temperature, and their dark color contributes to a lower operating temperature of the mesh. However, the suppression of emissions by such a coating is not satisfactory. All the mentioned coatings are applied uniformly to the inner and outer surfaces of the grid, with the inner surface being the surface facing the cathode and the outer surface surface facing the anode of the lamp. The power lamps according to the invention are characterized in that the inner surface of the grid is coated with an anti-emission metal or a combination of these metals, and the outer surface of the grid is coated with pyrolytic carbon. Preferably, the metal for covering the grid is gold and palladium. An advantage of the invention is that the coating of gold, palladium or other anti-emission metal applied to the inner surface has excellent anti-emission properties and also serves as a reflector for cathode heat radiation when when the outer, covered with pyrolytic carbon, increases the mechanical strength of the mesh at high temperature, contributing to the lowering of the temperature by its dark color. Claims 1. Grid of electron power lamps, characterized in that the inner surface of the mesh is covered with a metal of anti-emission properties, or a combination of such metals, and its outer surface is coated with pyrolytic carbon. 2. Grid according to claim The method of claim 1, characterized in that the surface of the mesh is covered with gold, palladium or a combination of these anti-emission metals. Mintage 100 copies Price PLN 100 PL
Claims (2)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS929580A CS224267B1 (en) | 1980-12-24 | 1980-12-24 | Power tube grid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL234382A2 PL234382A2 (en) | 1982-09-27 |
| PL130098B2 true PL130098B2 (en) | 1984-07-31 |
Family
ID=5443775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL23438281A PL130098B2 (en) | 1980-12-24 | 1981-12-22 | Grid of high-power tube |
Country Status (4)
| Country | Link |
|---|---|
| CS (1) | CS224267B1 (en) |
| DE (1) | DE3149696C2 (en) |
| FR (1) | FR2496979A1 (en) |
| PL (1) | PL130098B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2699518A (en) * | 1952-03-19 | 1955-01-11 | Cohn Eugene | Grid for electron tubes |
| DE1098624B (en) * | 1954-02-08 | 1961-02-02 | Philips Nv | Electric discharge tubes with a cathode activated by alkaline earth metal compounds |
| FR1344220A (en) * | 1962-03-02 | 1963-11-29 | Thomson Houston Comp Francaise | Grid for electron tubes |
-
1980
- 1980-12-24 CS CS929580A patent/CS224267B1/en unknown
-
1981
- 1981-12-08 FR FR8122946A patent/FR2496979A1/en active Granted
- 1981-12-15 DE DE19813149696 patent/DE3149696C2/en not_active Expired
- 1981-12-22 PL PL23438281A patent/PL130098B2/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE3149696C2 (en) | 1985-05-02 |
| DE3149696A1 (en) | 1982-08-12 |
| FR2496979A1 (en) | 1982-06-25 |
| PL234382A2 (en) | 1982-09-27 |
| FR2496979B3 (en) | 1983-11-04 |
| CS224267B1 (en) | 1984-01-16 |
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