DE1077796B - Graphite electrode for electric vacuum vessels - Google Patents

Graphite electrode for electric vacuum vessels

Info

Publication number
DE1077796B
DE1077796B DER25886A DER0025886A DE1077796B DE 1077796 B DE1077796 B DE 1077796B DE R25886 A DER25886 A DE R25886A DE R0025886 A DER0025886 A DE R0025886A DE 1077796 B DE1077796 B DE 1077796B
Authority
DE
Germany
Prior art keywords
graphite electrode
vacuum vessels
electric vacuum
graphite
vessels
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
Application number
DER25886A
Other languages
German (de)
Inventor
Dr Hans Heinrich Ruessmann
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.)
SGL Group GmbH Werk Ringsdorf
Original Assignee
Ringsdorff Werke GmbH
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 Ringsdorff Werke GmbH filed Critical Ringsdorff Werke GmbH
Priority to DER25886A priority Critical patent/DE1077796B/en
Publication of DE1077796B publication Critical patent/DE1077796B/en
Pending 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
    • H01J19/28—Non-electron-emitting electrodes; Screens
    • H01J19/30—Non-electron-emitting electrodes; Screens characterised by the material
    • 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
    • H01J2893/002—Chemical composition and manufacture chemical
    • H01J2893/0021—Chemical composition and manufacture chemical carbon

Landscapes

  • Carbon And Carbon Compounds (AREA)

Description

Graphitelektrode für elektrische Vakuumgefäße Bei Graphitdektroden, die in evakuierten elektrischen Entladungsgefäßen verwendet werden, insbesondere bei Anoden, ist es von großer Bedeutung, Rückzündungen zu vermeiden. Die Graphitoberfläche, die von den auftreffenden Elektronen mit großer Energie getroffen wird, kann besonders an porösen Stellen zerstäubt werden. Die Staubteilchen setzen sich teilweise auf der Elektrodenoberfläche ab und können dann als Folge. der durch sie verursachten Feldverzerrung, also der Spitzenwirkung, Anlaß zu Rückzündungen "geben.Graphite electrode for electrical vacuum vessels For graphite electrodes, which are used in evacuated electrical discharge vessels, in particular in the case of anodes, it is very important to avoid re-ignition. The graphite surface, which is hit by the impacting electrons with great energy, can especially be atomized in porous areas. The dust particles partially build up the electrode surface and can then as a result. caused by them Field distortion, ie the peak effect, give rise to re-ignition ".

Diese Gefahr wird bei Graphitelektroden für elektrische Entladungsgefäße erfindungsgemäß wesentlich vermindert durch eine harte Oberfläche oder Haut. Eine solche Haut kann z. B. durch sogenannten Glanzkohlenstoff gebildet werden, der durch Zersetzung von Kohlenwasserstoffen entsteht. Er kann nach an sich bekannten Verfahren, die nicht Gegenstand der Erfindung sind, z. B. auf der Anode erzeugt werden, beispielsweise nach dem im deutschen Patent 402 153 angegebenen Verfahren. Der Glanzkohlenstoff scheidet sich in sphärolitischer Form ab. Er hat sich gegen das Elektronenbombardement als sehr widerstandsfähig erwiesen. Die Zerstäubungsfestigkeit des Graphits wird hierdurch stark erhöht.In the case of graphite electrodes for electrical discharge vessels, this risk is substantially reduced according to the invention by a hard surface or skin. Such a skin can e.g. B. formed by so-called lustrous carbon, which is formed by the decomposition of hydrocarbons. He can according to methods known per se, which are not the subject of the invention, for. B. be generated on the anode, for example by the method specified in German Patent 402 153. The lustrous carbon is deposited in spherical form. It has proven to be very resistant to electron bombardment. This greatly increases the resistance to atomization of the graphite.

Selbstverständlich kann man außer den Anoden auch andere Graphitelektroden, z. B. Steuergitter, mit Glanzkohle überziehen.Of course, besides the anodes, other graphite electrodes can also be used, z. B. Control grid, cover with charcoal.

Claims (1)

PATENTANSPRUCH: Graphitelektrode für elektrische Vakuumgefäße, insbesondere Anode, dadurch gekennzeichnet, daß ihre Oberfläche hart ist und z. B. mit Glanzkohlenstoff überzogen ist, der nach an sich bekannten Verfahren erzeugt ist. In Betracht gezogene Druckschriften: Deutsche Patentschriften Nr. 348 279, 402 153, 549 282; schweizerische Patentschrift Nr. 185 257. Claim: graphite electrode for electrical vacuum vessels, in particular anode, characterized in that its surface is hard and z. B. is coated with lustrous carbon, which is produced by methods known per se. Considered publications: German Patent Specifications Nos. 348 279, 402 153, 549 282; Swiss patent specification No. 185 257.
DER25886A 1959-07-04 1959-07-04 Graphite electrode for electric vacuum vessels Pending DE1077796B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER25886A DE1077796B (en) 1959-07-04 1959-07-04 Graphite electrode for electric vacuum vessels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER25886A DE1077796B (en) 1959-07-04 1959-07-04 Graphite electrode for electric vacuum vessels

Publications (1)

Publication Number Publication Date
DE1077796B true DE1077796B (en) 1960-03-17

Family

ID=7402040

Family Applications (1)

Application Number Title Priority Date Filing Date
DER25886A Pending DE1077796B (en) 1959-07-04 1959-07-04 Graphite electrode for electric vacuum vessels

Country Status (1)

Country Link
DE (1) DE1077796B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1270471B (en) * 1965-01-05 1968-06-12 Philips Nv Use of an object consisting of a surface layer of pyrolytic graphite for melting and vaporizing substances reactive with carbon
FR2345804A1 (en) * 1976-03-27 1977-10-21 Philips Nv PROCESS FOR THE REALIZATION OF ELECTRODES IN THE FORM OF A GRID FOR ELECTRONIC TUBES AND ELECTRODE SO REALIZED

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE348279C (en) * 1920-01-11 1922-02-03 Edgar Sachs Anode for high vacuum tubes
DE402153C (en) * 1923-09-06 1924-09-13 Curt Roechling Dr Ing Production of luster coal
DE549282C (en) * 1929-08-14 1932-04-25 Westinghouse Electric & Mfg Co Process for carbonizing the surfaces of metals for grids of electron tubes
CH185257A (en) * 1934-06-20 1936-07-15 Philips Nv Process for blackening surfaces, in particular electrodes and other components of discharge tubes, as well as radiating bodies.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE348279C (en) * 1920-01-11 1922-02-03 Edgar Sachs Anode for high vacuum tubes
DE402153C (en) * 1923-09-06 1924-09-13 Curt Roechling Dr Ing Production of luster coal
DE549282C (en) * 1929-08-14 1932-04-25 Westinghouse Electric & Mfg Co Process for carbonizing the surfaces of metals for grids of electron tubes
CH185257A (en) * 1934-06-20 1936-07-15 Philips Nv Process for blackening surfaces, in particular electrodes and other components of discharge tubes, as well as radiating bodies.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1270471B (en) * 1965-01-05 1968-06-12 Philips Nv Use of an object consisting of a surface layer of pyrolytic graphite for melting and vaporizing substances reactive with carbon
FR2345804A1 (en) * 1976-03-27 1977-10-21 Philips Nv PROCESS FOR THE REALIZATION OF ELECTRODES IN THE FORM OF A GRID FOR ELECTRONIC TUBES AND ELECTRODE SO REALIZED

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