DE619133C - Oxide cathode (oxide cathode wire) and method of manufacture - Google Patents

Oxide cathode (oxide cathode wire) and method of manufacture

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Publication number
DE619133C
DE619133C DES92144D DES0092144D DE619133C DE 619133 C DE619133 C DE 619133C DE S92144 D DES92144 D DE S92144D DE S0092144 D DES0092144 D DE S0092144D DE 619133 C DE619133 C DE 619133C
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DE
Germany
Prior art keywords
oxides
oxide cathode
oxide
wire
cathode
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
DES92144D
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German (de)
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Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DES92144D priority Critical patent/DE619133C/en
Application granted granted Critical
Publication of DE619133C publication Critical patent/DE619133C/en
Expired legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00Apparatus 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
    • H01J9/02Manufacture of electrodes or electrode systems
    • H01J9/04Manufacture of electrodes or electrode systems of thermionic cathodes
    • H01J9/042Manufacture, activation of the emissive part

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Cold Cathode And The Manufacture (AREA)

Description

Oxydkathode (Oxydkathodendraht) und Verfahren zur Herstellung Die Erfindung betrifft eine besondere Ausführungsart einer Oxydkathode und eines Verfahrens zu ihrer Herstellung nach dem Hauptpatent 6oo 374 und besteht in der Verwendung von dampfförmigem Gemisch verschiedener Acetylacetonate zwecks Bildung eines Niederschlages von Oxydgemischen auf einem leitenden Träger (Heizdraht). Man hat zwar schon aus dem Dampfe von Acetylacetonaten auf Drähten Metalle niedergeschlagen, um dem Draht eine hohe Elektronenemission zu erteilen, im Gegensatz - zur Erfm.dung, bei der Oxyde den emittierenden Überzug bilden. Insbesondere sollen hochemittierende Oxyde, wie Bariumoxyd, einerseits und temperaturbeständige saure Oxyde, wie Aluminiumoxyd, Zirkonoxyd, Zinkoxyd u. dgl., andererseits gleichzeitig auf den leitenden Träger abgeschieden werden, und zwar von jeder Gruppe entweder eines oder mehrere. Das Verhältnis der Komponenten wird zweckmäßig annähernd so gewählt, daß eine chemische Verbindung der beiden Oxydgruppen resultiert (z. B. Bariumaluminat ) und nur kleine Mengen .der einen oder anderen Gruppe neben der chemischen Verbindung vorhanden sind. Das dampfförmige Gemisch der Acetylacetonate kann durch Verdampfen einer flüssigen oder festen Mischung dieser Stoffe erzeugt werden. Die Oxydgemische können entweder in der sonst fertigen Kathodenröhre auf dem Heizdraht zur Abscheidung gebracht werden, indem man die Kathode in :dem Dampfgemisch mit oder ohne Zusatz von Gasen elektrisch erhitzt, oder aber man kann einen Draht fortlaufend mit einem Überzug versehen und erhält bei geeigneter Wähl der Oxydmischung- einen an der Luft haltbaren Kathodendraht, der aufbewahrt werden und nach beliebiger Zeit in die Entladungsröhre eingebaut werden kann.Oxide cathode (oxide cathode wire) and method of making the The invention relates to a particular embodiment of an oxide cathode and a method for their production according to the main patent 6oo 374 and consists in the use of a vaporous mixture of various acetylacetonates for the purpose of forming a precipitate of oxide mixtures on a conductive carrier (heating wire). It's already out the vapor of acetylacetonates on wires metals precipitated to the wire to give a high electron emission, in contrast - to Erfm.dung in which Oxides form the emissive coating. In particular, high-emitting oxides, such as barium oxide, on the one hand, and temperature-resistant acidic oxides, such as aluminum oxide, Zirconium oxide, zinc oxide and the like, on the other hand simultaneously on the conductive support be deposited, either one or more of each group. That The ratio of the components is expediently chosen approximately so that a chemical Connection of the two oxide groups results (e.g. barium aluminate) and only small Amounts of one or the other group are present in addition to the chemical compound are. The vaporous mixture of acetylacetonates can be obtained by evaporation of a liquid or a solid mixture of these substances. The oxide mixtures can either are deposited in the otherwise finished cathode tube on the heating wire, by placing the cathode in: the vapor mixture with or without the addition of gases electrically heated, or you can continuously provide a wire with a coating and With a suitable choice of the oxide mixture, it receives a cathode wire that can be kept in the air, which are kept and built into the discharge tube after any time can be.

Claims (1)

PATENTANSPRÜCHE: z. Verfahren zur Herstellung von Oxydkathoden bzw. eines Kathodendrahtes nach Patent 600 37q., dadurch gekennzeichnet, daß aus dem Dampf.-eines Gemisches von Acetylacetonaten, der gegebenenfalls durch Gase oder andere Dämpfe, insbesondere solche mit Sauerstoffpartialdruck, verdünnt sein: kann, verschiedene Oxyde, von denen mindestens eines hochemittierend ist, gleichzeitig auf einen erhitzten leitenden Träger miedergeschlagen werden. z. Nach -dem Verfahren gemäß Anspruch r hergestellte Kathode, dadurch gekennzeichnet, daB das niedergeschlagehe Gemisch aus -einem oder meh,.eren: hochemittierenden Oxyden und einem der mehreren Oxyden von saurem Charakter besteht, die vorzugsweise annähernd in ihrem Mengenverhältnis einer chemischen Verbindung zwischen .den hochemittierenden und den sauren Oxyden entsprechen. PATENT CLAIMS: e.g. Process for the production of oxide cathodes or a cathode wire according to patent 600 37q., Characterized in that, from the vapor, a mixture of acetylacetonates, which can optionally be diluted by gases or other vapors, in particular those with partial pressure of oxygen: various oxides, at least one of which is highly emissive, are simultaneously dropped onto a heated conductive substrate. z. Cathode produced according to the method according to claim r, characterized in that the precipitated mixture consists of one or more high-emitting oxides and one of the several oxides of acidic character, which are preferably approximately in their quantitative ratio of a chemical compound between highly emissive and acidic oxides.
DES92144D 1929-06-09 1929-06-09 Oxide cathode (oxide cathode wire) and method of manufacture Expired DE619133C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES92144D DE619133C (en) 1929-06-09 1929-06-09 Oxide cathode (oxide cathode wire) and method of manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES92144D DE619133C (en) 1929-06-09 1929-06-09 Oxide cathode (oxide cathode wire) and method of manufacture

Publications (1)

Publication Number Publication Date
DE619133C true DE619133C (en) 1935-09-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DES92144D Expired DE619133C (en) 1929-06-09 1929-06-09 Oxide cathode (oxide cathode wire) and method of manufacture

Country Status (1)

Country Link
DE (1) DE619133C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE956256C (en) * 1953-05-31 1957-01-17 Siemens Ag Process to increase the layer conductivity of oxide cathodes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE956256C (en) * 1953-05-31 1957-01-17 Siemens Ag Process to increase the layer conductivity of oxide cathodes

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