DE1038664B - Cast or extruded cerium-mixed metal-manganese alloys as getter metals for electron tubes - Google Patents

Cast or extruded cerium-mixed metal-manganese alloys as getter metals for electron tubes

Info

Publication number
DE1038664B
DE1038664B DEG20126A DEG0020126A DE1038664B DE 1038664 B DE1038664 B DE 1038664B DE G20126 A DEG20126 A DE G20126A DE G0020126 A DEG0020126 A DE G0020126A DE 1038664 B DE1038664 B DE 1038664B
Authority
DE
Germany
Prior art keywords
cerium
cast
extruded
electron tubes
mixed metal
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
DEG20126A
Other languages
German (de)
Inventor
Dr Walter Bungardt
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.)
Evonik Operations GmbH
Original Assignee
TH Goldschmidt AG
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 TH Goldschmidt AG filed Critical TH Goldschmidt AG
Priority to DEG20126A priority Critical patent/DE1038664B/en
Publication of DE1038664B publication Critical patent/DE1038664B/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J7/00—Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps
    • H01J7/14—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J7/18—Means for absorbing or adsorbing gas, e.g. by gettering
    • H01J7/183—Composition or manufacture of getters

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Description

Gegossene oder stranggepreßte Cer-Mischmetall-Mangan-Legierungen als Gettermetalle für Elektronenröhren Bei der Herstellung von Elektronenröhren ist die Verwendung von gegossenem Gettermetall üblich. E5 soll durch Adsorption oder chemische Bindung der Restgase die Herstellung des Vakuums während des Pumpprozesses bei der Röhrenfertigung erleichtern und während des Betriebs aufrechterhalten. Derartige Gettermetalle oder -legierungen werden in allen Empfängerröhren und in den meisten Senderöhren verwendet. Während des Pumpprozesses wird das Gettermetall meist durch Wirbelstromheizung so hoch erhitzt, daß es verdampft. Es schlägt sich dann als Spiegel auf der Innenwand des Röhrenkolbens nieder und bindet hierbei die Restgase chemisch oder durch Adsorption. Entsprechend dem bisherigen Stand der Technik sind folgende Gettermetalle einzeln oder in Legierungen miteinander bekannt: Barium, Calzium. Thorium, Caesium und Magnesium. Es sind auch bereits Fangstoffgillen aus einer Erdalkali-Magnesium-Legierung für elektrische Entladungsgefäße bekannt. welche geringe Mengen gepulvertes Cer oder Cer-Lanthan-Mischmetall enthalten.Cast or extruded cerium-mischmetal-manganese alloys as Getter metals for electron tubes In the manufacture of electron tubes is the use of cast getter metal is common. E5 is said to be by adsorption or chemical bonding of the residual gases creating the vacuum during the pumping process facilitate the manufacture of tubes and maintain them during operation. Such Getter metals or alloys are used in all receiver tubes and in most Transmission tubes used. The getter metal is mostly through during the pumping process Eddy current heating heated so high that it evaporates. It then turns out to be a mirror on the inner wall of the tubular flask and chemically binds the residual gases or by adsorption. According to the prior art, the following are Getter metals known individually or in alloys with one another: barium, calcium. Thorium, cesium and magnesium. There are also catch material gills made of an alkaline earth-magnesium alloy known for electrical discharge vessels. what small amounts of powdered cerium or cerium-lanthanum mischmetal.

Die Erfindung bezieht sich auf gegossene oder stranggepreßte Cer-Mischmetall-Mangan-Legierungen als Gettermetalle für Elektronenröhren. Unter Cermischmetall ist hierbei ein handelsübliches Gemisch der Seltenen Erdmetalle verstanden. Die Manganzusätze werden gemäß der Erfindung in den Grenzen zwischen 0,1 und 35% gehalten.The invention relates to cast or extruded cerium-mischmetal-manganese alloys as getter metals for electron tubes. Cermischmetall is a commercially available one Understood mixture of rare earth metals. The manganese additives are according to the invention kept within the limits between 0.1 and 35%.

Diese Legierungen können in verschiedenen Zuständen in der gleichen Weise mit Erfolg angewendet werden. So ist es z. B. gleichgültig, ob die beanspruchte Getterlegierung im Gußzustand oder nach einer zusätzlichen Strangpreßverfo@rmung zur Anwendung gelangt. Es wurde gefunden, daß besonders durch einen Strangpreßprozeß leicht und sehr bequem beliebig lange, profilierte Stäbe hergestellt werden können, die für die Fertigung besonders gut geeignet sind.These alloys can be in different states in the same Way to be applied with success. So it is z. B. does not matter whether the claimed Getter alloy in the as-cast state or after additional extrusion molding is applied. It has been found that particularly through an extrusion process Profiled bars of any length can be produced easily and very conveniently, which are particularly well suited for production.

Es ist auch möglich, die Cer-Mischmetall-Mangan-Legierung durch weitere Legierungszusätze zu modifizieren, wobei vor allem kleine Magnesiumzusätze in den Grenzen zwischen 0,1 und 3% sich als vorteilhaft erwiesen haben.It is also possible to use the cerium-mischmetal-manganese alloy by further Modify alloy additives, especially small magnesium additives in the Limits between 0.1 and 3% have proven advantageous.

Mit Hilfe dieser Legierungen gelingt es leicht, schon während des Auspumpens der Elektronenröhren ein hervorragendes Vakuum zu erreichen, das auch nach langer Betriebszeit aufrechterhalten bleibt.With the help of these alloys it is easy to achieve even during the Pumping out the electron tubes to achieve an excellent vacuum, that too is maintained after a long period of operation.

Claims (2)

PATENTANSPRÜCHE: 1. Gegossene oder stranggepreßte Cer-Mischmetall-Mangan-Legierungen als Gettermetalle für Elektronenröhren, dadurch gekennzeichnet, daß die Legierung 0,1 bis 359/o Mangan enthält. PATENT CLAIMS: 1. Cast or extruded cerium-mischmetal-manganese alloys as getter metals for electron tubes, characterized in that the alloy contains 0.1 to 359 / o manganese. 2. Legierung nach Anspruch 1, dadurch gekennzeichnet, daß 0,1 bis 3% Magnesium in der Legierung enthalten sind. In Betracht gezogene Druckschriften: Deutsche Patentschriften Nr. 721911, 890 101.2. Alloy according to claim 1, characterized in that 0.1 to 3% magnesium is contained in the alloy. Considered publications: German Patent Specifications No. 721911, 890 101.
DEG20126A 1956-07-19 1956-07-19 Cast or extruded cerium-mixed metal-manganese alloys as getter metals for electron tubes Pending DE1038664B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEG20126A DE1038664B (en) 1956-07-19 1956-07-19 Cast or extruded cerium-mixed metal-manganese alloys as getter metals for electron tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG20126A DE1038664B (en) 1956-07-19 1956-07-19 Cast or extruded cerium-mixed metal-manganese alloys as getter metals for electron tubes

Publications (1)

Publication Number Publication Date
DE1038664B true DE1038664B (en) 1958-09-11

Family

ID=7121428

Family Applications (1)

Application Number Title Priority Date Filing Date
DEG20126A Pending DE1038664B (en) 1956-07-19 1956-07-19 Cast or extruded cerium-mixed metal-manganese alloys as getter metals for electron tubes

Country Status (1)

Country Link
DE (1) DE1038664B (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE721911C (en) * 1937-06-24 1942-06-22 Artur Schoeller Method and device for enclosing easily oxidizable metals in metal tubes
DE890101C (en) * 1940-11-21 1953-09-17 Telefunken Gmbh Catcher pill with an alkaline earth magnesium alloy for electrical discharge vessels

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE721911C (en) * 1937-06-24 1942-06-22 Artur Schoeller Method and device for enclosing easily oxidizable metals in metal tubes
DE890101C (en) * 1940-11-21 1953-09-17 Telefunken Gmbh Catcher pill with an alkaline earth magnesium alloy for electrical discharge vessels

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