DE700751C - Process for the production of iron powder for mass cores - Google Patents

Process for the production of iron powder for mass cores

Info

Publication number
DE700751C
DE700751C DE1935S0120613 DES0120613D DE700751C DE 700751 C DE700751 C DE 700751C DE 1935S0120613 DE1935S0120613 DE 1935S0120613 DE S0120613 D DES0120613 D DE S0120613D DE 700751 C DE700751 C DE 700751C
Authority
DE
Germany
Prior art keywords
iron powder
production
mass
cores
particles
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
DE1935S0120613
Other languages
German (de)
Inventor
Hans Hesse
Dipl-Ing Martin Kersten
Carl Kesselring
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.)
Siemens and Halske AG
Siemens Corp
Original Assignee
Siemens and Halske AG
Siemens Corp
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 Siemens and Halske AG, Siemens Corp filed Critical Siemens and Halske AG
Priority to DE1935S0120613 priority Critical patent/DE700751C/en
Application granted granted Critical
Publication of DE700751C publication Critical patent/DE700751C/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/14Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
    • H01F1/20Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder
    • H01F1/22Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
    • H01F1/24Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Description

Verfahren zur Herstellung von Eisenpulver für Massekerne Das Hauptpatent bezieht sich auf ein Verfahren zur Herstellung von Eisenpulver für Massekerne, insbesondere für die Belastung von Fernmeldeleitungen, bei dem das Eisenpulver keiner eine Sinterung bewirkenden Glühbehandlung unterworfen wird. Das Verfahren nach dem Hauptpatent besteht darin, daß ohne mechanische Zerkleinerung, _ insbesondere durch Zersetzen des Carbonyls gewonnenes Eisenpulver vor dem Isolationsvorgang einer allseitigen mechanischen Bearbeitung solcher Stärke und Dauer unterworfen wird, daß Änderungen der Größe und Form der Eisenteilchen praktisch vermieden werden, jedoch der Hysteresefaktor des aus diesem Eisenpulver hergestellten Massekerns wesentlich verringert wird. Die allseitige, möglichst gleichmäßig erfolgende mechanische Bearbeitung der Teilchen findet dabei beispielsweise in einem Kollergang oder in einer Schlag-, Stift- oder Flügelmühle statt.Process for the production of iron powder for mass cores The main patent relates to a method for producing iron powder for mass cores, in particular for the loading of telecommunication lines, in which the iron powder does not undergo sintering causing annealing treatment is subjected. The procedure according to the main patent consists in that without mechanical crushing, _ in particular by decomposition Iron powder obtained from the carbonyl before the isolation process of an all-round mechanical processing of such strength and duration is subjected to changes the size and shape of the iron particles can be practically avoided, but the hysteresis factor of the mass core made from this iron powder is significantly reduced. The mechanical processing of the particles, which takes place as uniformly as possible, on all sides takes place, for example, in a pan mill or in a punch, pin or Wing mill instead.

Bei der Durchführung des Verfahrens nach dem Hauptpatent hat sich ergeben, daß bei der nachfolgenden Isolierung des Eisenpulvers unter Umständen ein Zusammenbacken des Pulvers zu zusammenhängenden Stücken eintritt, wodurch die nachfolgende Formgebung durch Pressung erschwert wird.When carrying out the process according to the main patent show that in the subsequent isolation of the iron powder a Caking of the powder into coherent pieces occurs, causing the subsequent Shaping is made difficult by pressing.

Die der Erfindung zugrunde liegenden Versuche haben nun ergeben, daß man diesen Mangel dadurch beseitigen kann, daß gemäß der Erfindung die allseitige mechanische Bearbeitung der Teilchen im Sinne des Verfahrens des Hauptpatents mindestens teilweise nach dem Isolieren des Eisenpulvers, also unmittelbar vor dem Pressen des Kerns vorgenommen wird.The experiments on which the invention is based have now shown that you can eliminate this deficiency in that according to the invention the all-round mechanical processing of the particles in the sense of the process of the main patent at least partly after the iron powder has been isolated, i.e. immediately before pressing of the core is made.

Man hätte annnehmen können, daß durch die allseitige Beanspruchung der Teilchen nach dem Isoliervorgang eine Beschädigung der Isolation und damit eine Beeinträchtigung der magnetischen Eigenschaften, insbesondere eine Verschlechterung des Hysteresefaktors des Massekerns, eintreten könnte. Überraschenderweise zeigte sich aber, daß man bei zweckentsprechender Isolation, insbesondere bei Anwendung mehrerer verschiedener Isolationsschichten für die Eisenpulverteilchen, keinerlei Verschlechterung der magnetischen Eigenschaften des Massekerns erhält, sondern 'vielmehr eine Herabsetzung der Hystereseverluste in ähnlichem Ausmaß wie bei dem Verfahren nach dem Hauptpatent.One could have assumed that due to the stress on all sides of the particles after the insulation process damage the insulation and thus a Deterioration in magnetic properties, especially deterioration of the hysteresis factor of the mass core, could occur. Surprisingly showed but that one with appropriate isolation, especially when using several different insulation layers for the iron powder particles, none Deterioration of the magnetic properties of the mass core, but 'Rather, a reduction in hysteresis losses to a similar extent as in the case of the Procedure according to the main patent.

So wurde z. B. gefunden, daß für ein aus Carbonyl gewonnenes Eisenpulver, das in der gewünschten Form und Größe vorlag, nach erfolgter Isolation der Teilchen durch Aufbringen mehrerer Isolationsschichten aus verschiedenem Material der Hysteresefaktor k-I Ro in unbearbeitetem Zustande 0,57 cm/kA betrug, während er nach 24stündiger Behandlung des isolierten Pulvergemisches in einer Kugelmühle unter möglichst gleichmäßiger, allseitiger Beanspruchung der isolierten Teilchen auf o,a8 cm/kA gesunken war. (Dabei bedeutet lt den spezifischen Hystereseverlustwiderstand in Ohm/H A W kHz und quo die Ancm fangspermeabilität, die in dem vorliegenden Falle 4,1 betrug.) Dieser Versuch zeigt, daß der Hystereseverlust um über 5o0/, vermindert wurde durch die Anwendung des neuen Verfahrens. Die Permeabilität blieb praktisch bei dem gleichen Wert.So was z. B. found that for an iron powder obtained from carbonyl, which was present in the desired shape and size, after isolation of the particles by applying several layers of insulation made of different materials, the hysteresis factor kI Ro in the unprocessed state was 0.57 cm / kA, while he after the isolated powder mixture had been treated for 24 hours in a ball mill and the isolated particles were subjected to stress on all sides that was as uniform as possible, it had dropped to 0.8 cm / kA. (Here, lt means the specific hysteresis loss resistance in ohms / H A W kHz and quo the initial permeability, which in the present case was 4.1.) This experiment shows that the hysteresis loss was reduced by more than 50% by using the new one Procedure. The permeability remained practically the same value.

Durch das neue Verfahren wird somit gegenüber dem Verfahren nach dem Haupt- patent einerseits der Vorteil erreicht, daß man die beim Verfahren nach dem Hauptpatent erforderliche mechanische Bearbeitung vor Im Isolieren ganz oder zum Teil ersetzen n durch die ohnehin oft notwendige mecha- ' che Zerkleinerung der Masse nach dem Isoliervorgang ohne Beeinträchtigung des günstigen Effektes der weitgehenden Vermin- derung der Hystereseverluste. Andererseits bietet das neue Verfahren auch noch den Vorteil, daß man infolge der mittels des neuen Verfahrens erzielten äußerst geringen Teilchengrößen des zu pressenden Massepulvers im allgemeinen schon mit geringeren Preßdrucken eine für 1lassekerne hinreichende Festigkeit erhält.Compared to the method according to the main patent on the one hand achieves the advantage that one those in the process according to the main patent required mechanical processing Replace in whole or in part in isolation n due to the often necessary mechanical 'che crushing of the mass after Isolation process without affecting the favorable effect of the extensive reduction change in hysteresis losses. On the other hand, the new process also offers the advantage that, as a result of the extremely small particle sizes of the mass powder to be pressed, which are achieved by means of the new process, a strength sufficient for 1lasse cores is generally obtained even with lower pressing pressures.

Claims (1)

1'@\-rL.'; @s ,1,teue 11 Verfahren zur Herstellung von Eisenpulver für Massekerne durch allseitige, die Größe und Form der Eisenteilchen praktisch nicht ändernde mechanische Bearbeitung von ohne mechanische Zerkleinerung gewonnenem Eisenpulver nach Patent 678:1t3, dadurch gekennzeichnet, daß diese Bearbeitung mindestens teilweise nach dem Isolieren des Eisenpulvers vorgenommen wird.1 '@ \ - rL.'; @s, 1, expensive 11 process for the production of iron powder for mass cores by mechanical processing on all sides, the size and shape of the iron particles practically unchanged, of iron powder obtained without mechanical comminution according to patent 678: 1t3, characterized in that this processing at least partially according to the Isolating the iron powder is made.
DE1935S0120613 1935-11-29 1935-11-29 Process for the production of iron powder for mass cores Expired DE700751C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1935S0120613 DE700751C (en) 1935-11-29 1935-11-29 Process for the production of iron powder for mass cores

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1935S0120613 DE700751C (en) 1935-11-29 1935-11-29 Process for the production of iron powder for mass cores

Publications (1)

Publication Number Publication Date
DE700751C true DE700751C (en) 1940-12-30

Family

ID=7535273

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1935S0120613 Expired DE700751C (en) 1935-11-29 1935-11-29 Process for the production of iron powder for mass cores

Country Status (1)

Country Link
DE (1) DE700751C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977502C (en) * 1950-04-27 1966-09-15 Gen Aniline & Film Corp Process for the production of a carbonyl iron powder suitable for the production of magnetic cores with a high specific resistance and low energy loss at very high frequencies

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977502C (en) * 1950-04-27 1966-09-15 Gen Aniline & Film Corp Process for the production of a carbonyl iron powder suitable for the production of magnetic cores with a high specific resistance and low energy loss at very high frequencies

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