DE1055135B - Storage cathode for electrical discharge tubes with a protective coating against oxidation - Google Patents
Storage cathode for electrical discharge tubes with a protective coating against oxidationInfo
- Publication number
- DE1055135B DE1055135B DEE11901A DEE0011901A DE1055135B DE 1055135 B DE1055135 B DE 1055135B DE E11901 A DEE11901 A DE E11901A DE E0011901 A DEE0011901 A DE E0011901A DE 1055135 B DE1055135 B DE 1055135B
- Authority
- DE
- Germany
- Prior art keywords
- silicon
- cathode
- boron
- compound
- boron compound
- 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.)
- Pending
Links
- 230000003647 oxidation Effects 0.000 title claims description 12
- 238000007254 oxidation reaction Methods 0.000 title claims description 12
- 239000011253 protective coating Substances 0.000 title claims description 4
- 150000001639 boron compounds Chemical class 0.000 claims description 17
- 229910052710 silicon Inorganic materials 0.000 claims description 16
- 239000010703 silicon Substances 0.000 claims description 16
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 7
- 229910052750 molybdenum Inorganic materials 0.000 claims description 7
- 239000011733 molybdenum Substances 0.000 claims description 7
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 7
- 229910052721 tungsten Inorganic materials 0.000 claims description 7
- 239000010937 tungsten Substances 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 150000003377 silicon compounds Chemical class 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 229910052758 niobium Inorganic materials 0.000 claims description 5
- 239000010955 niobium Substances 0.000 claims description 5
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims description 5
- 229910052715 tantalum Inorganic materials 0.000 claims description 5
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 150000002366 halogen compounds Chemical class 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229910021332 silicide Inorganic materials 0.000 claims description 3
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 2
- 239000000463 material Substances 0.000 claims 2
- VXEGSRKPIUDPQT-UHFFFAOYSA-N 4-[4-(4-methoxyphenyl)piperazin-1-yl]aniline Chemical compound C1=CC(OC)=CC=C1N1CCN(C=2C=CC(N)=CC=2)CC1 VXEGSRKPIUDPQT-UHFFFAOYSA-N 0.000 claims 1
- 230000003213 activating effect Effects 0.000 claims 1
- 229910010293 ceramic material Inorganic materials 0.000 claims 1
- 239000011248 coating agent Substances 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000010276 construction Methods 0.000 claims 1
- 239000005049 silicon tetrachloride Substances 0.000 claims 1
- FAQYAMRNWDIXMY-UHFFFAOYSA-N trichloroborane Chemical compound ClB(Cl)Cl FAQYAMRNWDIXMY-UHFFFAOYSA-N 0.000 claims 1
- 239000010410 layer Substances 0.000 description 4
- 150000001553 barium compounds Chemical group 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/14—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5022—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with vitreous materials
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/80—Optical properties, e.g. transparency or reflexibility
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Solid Thermionic Cathode (AREA)
Description
DEUTSCHESGERMAN
Die Erfindung betrifft eine Vorratskatbode für elektrische Entladungsröhren mit einem Schutzüberzug gegen Oxydation und ein Verfahren zur Herstellung einer solchen Kathode.The invention relates to a supply cathode for electrical discharge tubes with a protective coating against oxidation and a method for making such a cathode.
In Entladungsröhren, z.B. in Kathodenstrahlröhren, ist die Kathode beim Verschmelzen bzw. während des Temperas der einzelnen Glasbestandteile für eine verhältnismäßig lange Zeit Erwärmungen ausgesetzt. Da diese Erwärmung in einem Zustande der Röhre stattfindet, in welchem sie noch nicht ausgepumpt ist, so werden insbesondere der aus Molybdän hergestellte Träger der Kathode sowie der poröse, gesinterte Wolframkörper der Kathode oberflächlich oxydiert. Die Oxydation erfolgt in erster Linie am Träger aus Molybdän, so daß am Ende der erwähnten Wärmebehandlung der Träger mit einer dünnen Oxydschicht überzogen ist. Dieser Umstand ist hinsichtlich der Wirkungsweise der Kathode besonders nachteilig. In gleicher Weise ist ■es ein Nachteil, wenn die Oberfläche des porösen Körpers oxydiert wird, obwohl eine solche Oxydation nur ziemlich selten stattfindet.In discharge tubes, e.g. in cathode ray tubes, the cathode is during melting or during the Temperas of the individual glass components exposed to heating for a relatively long time. There this heating takes place in a condition of the tube in which it has not yet been pumped out, see above In particular, the cathode carrier made of molybdenum and the porous, sintered one The surface of the tungsten body of the cathode is oxidized. The oxidation takes place primarily on the carrier Molybdenum, so that at the end of the heat treatment mentioned, the carrier with a thin oxide layer is covered. This fact is particularly disadvantageous with regard to the mode of operation of the cathode. In similarly, it is a disadvantage if the surface of the porous body is oxidized, although it is Oxidation occurs very rarely.
Die Erfindung bezweckt die Vermeidung der vorstehenden Nachteile, d. h. die Verhütung des Oxydierens des Trägers und des porösen Körpers.The invention aims to obviate the above disadvantages, i. H. the prevention of oxidation of the carrier and the porous body.
Es war bereits bekannt, Oxydkathoden für elektrische Entladungsröhren bei ihrer Herstellung außerhalb der Röhre an ihren Oberflächen gegen Oxydation an der Luft durch entsprechende Schutzschichten zu schützen, die später in der Röhre wieder verdampft werden sollen.It was already known to use oxide cathodes for electrical discharge tubes in their manufacture outside the surface of the tube against oxidation in the air by appropriate protective layers that are to be evaporated again later in the tube.
Bei Vorratskathoden war es bekannt, Schichten an der Kathodenoberfläche anzubringen, die aus Metall, aber nicht aus Verbindungen bestehen. Diese Schichten sollen nur die Wanderung des EmissionsstofFes erleichtern. In the case of supply cathodes, it was known to apply layers to the cathode surface that were made of metal, but not made up of connections. These layers are only intended to facilitate the migration of the emissions.
Es sind auch Vorratskathoden bekannt, insbesondere sogenannte l-Kathoden, bei welchen in dem die emittierende Oberfläche der Kathode bildenden und den Vorratsraum abschließenden porösen Körper zwecks Verbesserung der Emission verschiedene Metalleinschlüsse, so z. B. Siliziumeinschlüsse, vorgesehen sind. Es ist ferner bekannt, den porösen Körper mit solchen Metallüberzügen zu versehen. Diese Überzüge waren aber in erster Linie in bezug auf die Zersetzung der Bariumverbindungen von Wichtigkeit.There are also known storage cathodes, in particular so-called l cathodes, in which in the porous body forming the emitting surface of the cathode and closing the storage space, various metal inclusions, such as e.g. B. silicon inclusions are provided. It is also known to provide the porous body with such metal coatings. However, these coatings were primarily of importance with regard to the decomposition of the barium compounds.
Weiterhin ist es bekannt, gewisse Körper aus Metall zur Vermeidung der Oxydation mit einer Oberflächen-Silizidschicht zu versehen.It is also known to apply a surface silicide layer to certain bodies made of metal in order to avoid oxidation to provide.
Die Erfindung hat demgegenüber den Zweck, Oxydation von Vorratskathoden unter den eingangs erwähnten Bedingungen zu verhüten.In contrast, the invention has the purpose of oxidizing supply cathodes among those mentioned at the outset Conditions to prevent.
Dies wird dadurch erreicht, daß bei Vorratskathoden mit einem Schutzüberzug gegen Oxydation nach der Erfindung ihre aus Wolfram, Molybdän,This is achieved by providing cathodes with a protective coating against oxidation according to the invention theirs made of tungsten, molybdenum,
Vorratskathode
für elektrische Entladungsröhren
mit einem Schutzüberzug
gegen OxydationSupply cathode
for electric discharge tubes
with a protective cover
against oxidation
Anmelder:
Egyesült Izzolampa es Villamossagi
Reszvenyt arsasag,
BudapestApplicant:
Egyesält Izzolampa es Villamossagi
Reszvenyt arsasag,
Budapest
Vertreter: Dipl.-Ing. W. Meissner,
Berlin-Grunewald, Herbertstr. 22,
und Dipl.-Ing. H. Tischer, München 2, PatentanwälteRepresentative: Dipl.-Ing. W. Meissner,
Berlin-Grunewald, Herbertstr. 22
and Dipl.-Ing. H. Tischer, Munich 2, patent attorneys
Beanspruchte Priorität:
Ungarn vom 14. Februar 1955Claimed priority:
Hungary from February 14, 1955
Endre OldaI1 Budapest,
ist als Erfinder genannt wordenEndre OldaI 1 Budapest,
has been named as the inventor
Tantal oder Niob bestehenden Teile mindestens zum Teil an ihrer äußeren und/oder an ihrer inneren Oberfläche aus einer Siliziumverbindung oder aus einer Borverbindung der betreffenden metallischen Kathodenteile bestehen.Tantalum or niobium existing parts at least partially on their outer and / or on their inner surface from a silicon compound or from a boron compound of the relevant metallic cathode parts exist.
Vorzugsweise sind alle dichten Wandteile der Kathode mindestens außen mit einer Silizium- oder Borverbindung versehen.Preferably, all of the tight wall parts of the cathode are at least on the outside with a silicon or boron compound Mistake.
Ein Verfahren zur Herstellung der Kathode besteht darin, daß die mit einer Silizium- oder mit einer Borverbindung zu versehenden Bestandteile der Kathode mit hochfrequentem Strom in einer Atmosphäre erhitzt werden, die aus den Dämpfen einer Siliziumoder Borverbindung und aus Wasserstoff besteht.One method of manufacturing the cathode is that with a silicon or with a boron compound to be provided components of the cathode heated with high frequency current in an atmosphere consisting of the vapors of a silicon or boron compound and hydrogen.
Die Siliziumverbindung bzw. die Borverbindung kann eine Halogenverbindung, insbesondere ein Chlorid des Siliziums bzw. des Bors sein.The silicon compound or the boron compound can be a halogen compound, in particular a chloride of silicon or boron.
Eine beispielsweise Ausführungsform der Vorratskathode nach der Erfindung ist an Hand der Zeichnung näher erläutert.An example embodiment of the supply cathode according to the invention is shown in the drawing explained in more detail.
In der Zeichnung bedeutet 1 einen dichten metallischen, oben umgebördelten, unten offenen zylindrischen Körper. Dieser Körper 1 ist oben durch einen porösen, gesinterten, z. B. aus Wolfram gefertigten Körper 2 abgeschlossen. In den unteren Teil des zylindrischen Körpers 1 ist ein zweiter, am oberen TeilIn the drawing, 1 denotes a dense metallic, cylindrical, beaded at the top and open at the bottom Body. This body 1 is above by a porous, sintered, z. B. made of tungsten Body 2 completed. In the lower part of the cylindrical body 1 is a second, on the upper part
' '· 809 790/410'' 809 790/410
Claims (4)
Deutsche Patentschriften Nr. 803 919, 809 219;
deutsche Patentanmeldung S 22799 VIII c/21 g (bekanntgemacht am 24. 7. 1952).Considered publications:
German Patent Nos. 803 919, 809 219;
German patent application S 22799 VIII c / 21 g (published on July 24, 1952).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HU1055135X | 1955-02-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1055135B true DE1055135B (en) | 1959-04-16 |
Family
ID=44678115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEE11901A Pending DE1055135B (en) | 1955-02-12 | 1956-02-03 | Storage cathode for electrical discharge tubes with a protective coating against oxidation |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE1055135B (en) |
| NL (1) | NL101810C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1253818B (en) * | 1963-05-08 | 1967-11-09 | Hitachi Ltd | Gas discharge tubes |
| DE1294556B (en) * | 1960-06-09 | 1969-05-08 | Union Carbide Corp | Electrochemical measurement integrator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE803919C (en) * | 1944-11-04 | 1951-04-12 | Philips Nv | Method for manufacturing a cathode of an electrical discharge tube |
| DE809219C (en) * | 1946-11-13 | 1951-07-26 | Philips Nv | Process for producing the oxide cathode of an electrical discharge tube and discharge tubes produced according to this process |
-
0
- NL NL101810D patent/NL101810C/xx active
-
1956
- 1956-02-03 DE DEE11901A patent/DE1055135B/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE803919C (en) * | 1944-11-04 | 1951-04-12 | Philips Nv | Method for manufacturing a cathode of an electrical discharge tube |
| DE809219C (en) * | 1946-11-13 | 1951-07-26 | Philips Nv | Process for producing the oxide cathode of an electrical discharge tube and discharge tubes produced according to this process |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1294556B (en) * | 1960-06-09 | 1969-05-08 | Union Carbide Corp | Electrochemical measurement integrator |
| DE1253818B (en) * | 1963-05-08 | 1967-11-09 | Hitachi Ltd | Gas discharge tubes |
Also Published As
| Publication number | Publication date |
|---|---|
| NL101810C (en) |
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