DE467323C - Process for the manufacture of oxide cathodes - Google Patents

Process for the manufacture of oxide cathodes

Info

Publication number
DE467323C
DE467323C DES59991D DES0059991D DE467323C DE 467323 C DE467323 C DE 467323C DE S59991 D DES59991 D DE S59991D DE S0059991 D DES0059991 D DE S0059991D DE 467323 C DE467323 C DE 467323C
Authority
DE
Germany
Prior art keywords
manufacture
metal
oxide cathodes
coated
oxide
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
DES59991D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sueddeutsche Telefon Apparate Kabel und Drahtwerke AG TEKADE
Original Assignee
Sueddeutsche Telefon Apparate Kabel und Drahtwerke AG TEKADE
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 Sueddeutsche Telefon Apparate Kabel und Drahtwerke AG TEKADE filed Critical Sueddeutsche Telefon Apparate Kabel und Drahtwerke AG TEKADE
Priority to DES59991D priority Critical patent/DE467323C/en
Application granted granted Critical
Publication of DE467323C publication Critical patent/DE467323C/en
Expired legal-status Critical Current

Links

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
    • H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
    • H01J9/042—Manufacture, activation of the emissive part

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrolytic Production Of Metals (AREA)

Description

Verfahren zur Herstellung von Oxydkathoden Es gibt ein Verfahren zur Herstellung von Oxydkathoden, bei welchen ein Trägerfaden zunächst mit einem Metall überzogen wird, um dann nachträglich oxydiert zu werden. Die vorliegende Erfindung bezieht sich auf ein Verfahren, einen solchen nachträglich zu oxydierenden Metallüberzug auf einen Draht herzustellen. Erfindungsgemäß geschieht dies auf elektrolytischem Wege. Am zweckmäßigsten wird der zu überziehende Draht zur Kathode gemacht, während die Lösung ein Salz desjenigen Metalls enthält, mit welchem die Kathode belegt werden soll. Eine besonders günstige Ausführungsform des Verfahrens besteht darin, daß man bei dem elektrolytischen Prozeß das reine Metall der Salzlösung als Anode benutzt. Hierdurch wird als besonderer Vorteil erreicht, daß das abgeschiedene Metall in der Salzlösung dauernd ersetzt wird. Man könnte nun so verfahren, daß man, um beispielsweise die alkalischen und erdalkalischen Elemente auf den Trägerfaden aufzubringen, wäßrige Lösungen von Salzen dieser Elemente verwendet. Nach einer weiteren Ausgestaltung der vorliegenden Erfindung aber nimmt man als Elektrolyten geschmolzene wasserfreie Salze der obigen Metalle, um sämtliche störenden Nebenprozesse bei der Elektrolyse zu vermeiden. So kann man beispielsweise bei Herstellung eines Calciumüberzuges geschmolzenes Chlorcalcium benutzen.Process for the manufacture of oxide cathodes There is a process for Manufacture of oxide cathodes in which a carrier thread is initially bonded to a metal is coated in order to be subsequently oxidized. The present invention relates to a process for such a metal coating to be subsequently oxidized to manufacture on a wire. According to the invention, this is done electrolytically Ways. Most conveniently, the wire to be coated is made to the cathode while the solution contains a salt of the metal with which the cathode is coated target. A particularly favorable embodiment of the method is that the pure metal of the salt solution is used as the anode in the electrolytic process. This has the particular advantage that the deposited metal in the saline solution is constantly being replaced. One could now proceed in such a way that, in order to, for example to apply the alkaline and alkaline earth elements to the carrier thread, aqueous Solutions of salts of these elements are used. According to another embodiment in the present invention, however, the electrolyte used is molten anhydrous Salts of the above metals to avoid all disruptive secondary processes in electrolysis to avoid. So you can, for example, when producing a calcium coating use molten calcium chloride.

Claims (3)

PATENTANSPRÜCHE: i. Verfahren zurHerstellung vonOxydkathoden, bei welchen eine auf einem Trägerfaden aufgebrachte Metalloberfläche durch Einwirkung von Sauerstoff in das wirksame Oxyd verwandelt wird, dadurch gekennzeichnet, daß dieser Metallüberzug auf elektrolytischem Wege hergestellt wird. PATENT CLAIMS: i. Process for the manufacture of oxide cathodes which a metal surface applied to a carrier thread by action is converted by oxygen into the active oxide, characterized in that this metal coating is produced electrolytically. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß als Kathode der mit einer Metallschicht zu überziehende Träger und als Anode dasjenige Metall Verwendung findet, mit welchem der Draht überzogen werden soll. 2. Procedure according to Claim i, characterized in that the cathode with a metal layer to be coated carrier and that metal is used as the anode with which the wire is to be coated. 3. Verfahren nach Anspruch i und 2 oder einem von diesen, dadurch gekennzeichnet, daß als Elektrolyt geschmolzene wasserfreie Salze der überzugsmetalle benutzt werden.3. The method according to claim i and 2 or one of this, characterized in that molten anhydrous salts are used as the electrolyte of the coating metals are used.
DES59991D 1922-06-01 1922-06-01 Process for the manufacture of oxide cathodes Expired DE467323C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES59991D DE467323C (en) 1922-06-01 1922-06-01 Process for the manufacture of oxide cathodes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES59991D DE467323C (en) 1922-06-01 1922-06-01 Process for the manufacture of oxide cathodes

Publications (1)

Publication Number Publication Date
DE467323C true DE467323C (en) 1928-10-23

Family

ID=7493754

Family Applications (1)

Application Number Title Priority Date Filing Date
DES59991D Expired DE467323C (en) 1922-06-01 1922-06-01 Process for the manufacture of oxide cathodes

Country Status (1)

Country Link
DE (1) DE467323C (en)

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