DE613555C - Process for the production of electrodes from nickel for vacuum tubes - Google Patents

Process for the production of electrodes from nickel for vacuum tubes

Info

Publication number
DE613555C
DE613555C DES93464D DES0093464D DE613555C DE 613555 C DE613555 C DE 613555C DE S93464 D DES93464 D DE S93464D DE S0093464 D DES0093464 D DE S0093464D DE 613555 C DE613555 C DE 613555C
Authority
DE
Germany
Prior art keywords
electrodes
nickel
production
vacuum tubes
iron
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
DES93464D
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 DES93464D priority Critical patent/DE613555C/en
Application granted granted Critical
Publication of DE613555C publication Critical patent/DE613555C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
    • H01J2893/0012—Constructional arrangements
    • H01J2893/0019—Chemical composition and manufacture
    • H01J2893/0022—Manufacture
    • H01J2893/0023—Manufacture carbonising and other surface treatments

Landscapes

  • Chemical Treatment Of Metals (AREA)

Description

Verfahren zur Herstellung von Elektroden aus Nickel für Vakuumröhren Elektroden für Vakuumröhren mit einer Auflage aus dunklen Stoffen zum Zwecke starker Wärmeabstrahlung sind bereits bekannt, z. B. hat man Nickelelektroden durch Oxydation mit Nickeloxyd überzogen. Es ist auch bereits vorgeschlagen worden, Elektroden aus Eisen mit einem Belag aus Eisenoxyduloxyd, dessen wärmeabstrahlende Eigenschaften bekannt sind, zu versehen.Process for the production of electrodes from nickel for vacuum tubes Electrodes for vacuum tubes with a layer of dark fabrics for the purpose of stronger Heat radiation are already known, e.g. B. one has nickel electrodes by oxidation coated with nickel oxide. It has also been suggested to make electrodes Iron with a coating of iron oxide, its heat-radiating properties are known to be provided.

Gemäß dem Verfahren nach der Erfindung werden NickeIelektroden mit einer festhaftenden Eisenoxyduloxydschicht durch Aufbringen einer Lösung von Eisenchlorür und Eisenchlorid mit kleinen Zusätzen von Quecksilbersalzen oder einer Lösung einer organischen Eisenverbindung, z. B. Eisenoxalat, und anschließendes Glühen im Vakuum hergestellt. Um ein gutes Haften der in das Eisenoxydul-Oxyd umzuwandelnden Eisenverbindung auf der Nickelelektrode zu erreichen, wird man deren. Oberfläche zweckmäßig vor Aufbringen der Lösung in an sich bekannter Weise, z. B. durch Behandeln mit einem Sandstrahlgebläse, aufrauhen. Beim Erhitzen im Vakuum geht die Eisenverbindung in schwarzes Eisenoxyduloxyd über und bildet :einen festhaftenden Belag, der auch im Vakuum hohe Glühtemperaturen aushält, ohne seine schwarze Farbe zu verlieren. Bei der Umwandlung der Verbindung kann vorteilhaft die bei der Entgasung der Elektroden auftretende Wärme ausgenutzt werden. Die Durchführung des Prozesses im Vakuum schließt Verunreinigungen der Schicht aus und verhindert außerdem, daß von dieser nachträglich. Stoffe abgegeben werden können, welche nachteilig auf die Emission der Kathoden einwirken.According to the method according to the invention, nickel electrodes with a firmly adhering layer of iron oxide by applying a solution of iron chloride and ferric chloride with small additions of mercury salts or a solution of one organic iron compound, e.g. B. iron oxalate, and subsequent annealing in a vacuum manufactured. To ensure good adhesion of the iron compound to be converted into the iron oxide to achieve on the nickel electrode, one becomes theirs. Surface appropriate Applying the solution in a manner known per se, e.g. B. by treating with a Sandblasting blower, roughen. When heated in a vacuum, the iron compound goes into black iron oxide over and forms: a firmly adhering coating, which is also in the Vacuum withstands high annealing temperatures without losing its black color. at The conversion of the compound can be advantageous in the degassing of the electrodes occurring heat can be exploited. The implementation of the process in a vacuum concludes Contamination of the layer and also prevents from this afterwards. Substances can be emitted, which have a detrimental effect on the emission of the cathodes act.

Claims (1)

PATENTANSPRÜCHE: i. Verfahren zur Herstellung von Elektroden aus Nickel für Vakuumröhren, die zur Erhöhung der Wärmeabstrahlung durch Auflage dunkler Metalloxyde geschwärzt sind, dadurch gekennzeichnet, daß eine Lösung von tisenchlorür, Eisenchlorid und. etwas Quecksilbersalzen :oder einer organischen Eisenverbindung, z. B. Eisenoxalat, auf die Elektroden aufgetragen und diese dann im Vakuum geglüht werden. z. Gemäß Verfahren nach Anspruch i hergestellte Elektrode für Vakuumröhren. 3. Verfahren zur Herstellung von Elektroden nach Anspruch i, dadurch gekennzeichnet, daß diese vor der Behandlung aufgerauht werden.PATENT CLAIMS: i. Process for the production of electrodes from nickel for vacuum tubes, which are used to increase the heat radiation by applying dark metal oxides are blackened, characterized in that a solution of iron chloride, iron chloride and. some mercury salts: or an organic iron compound, e.g. B. iron oxalate, applied to the electrodes and these are then annealed in a vacuum. z. According to Process according to claim i produced electrode for vacuum tubes. 3. Procedure for the production of electrodes according to claim i, characterized in that these be roughened before treatment.
DES93464D 1929-08-20 1929-08-20 Process for the production of electrodes from nickel for vacuum tubes Expired DE613555C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES93464D DE613555C (en) 1929-08-20 1929-08-20 Process for the production of electrodes from nickel for vacuum tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES93464D DE613555C (en) 1929-08-20 1929-08-20 Process for the production of electrodes from nickel for vacuum tubes

Publications (1)

Publication Number Publication Date
DE613555C true DE613555C (en) 1935-05-21

Family

ID=7518014

Family Applications (1)

Application Number Title Priority Date Filing Date
DES93464D Expired DE613555C (en) 1929-08-20 1929-08-20 Process for the production of electrodes from nickel for vacuum tubes

Country Status (1)

Country Link
DE (1) DE613555C (en)

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