DE1614118A1 - Anisotropic permanent magnetic body - Google Patents

Anisotropic permanent magnetic body

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Publication number
DE1614118A1
DE1614118A1 DE1967M0072816 DEM0072816A DE1614118A1 DE 1614118 A1 DE1614118 A1 DE 1614118A1 DE 1967M0072816 DE1967M0072816 DE 1967M0072816 DE M0072816 A DEM0072816 A DE M0072816A DE 1614118 A1 DE1614118 A1 DE 1614118A1
Authority
DE
Germany
Prior art keywords
anisotropic permanent
remanence
permanent magnetic
magnetic body
starting material
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.)
Granted
Application number
DE1967M0072816
Other languages
German (de)
Other versions
DE1614118C3 (en
DE1614118B2 (en
Inventor
Dr Erich Steingroever
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.)
Magnetfabrik Bonn GmbH
Original Assignee
Magnetfabrik Bonn 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 Magnetfabrik Bonn GmbH filed Critical Magnetfabrik Bonn GmbH
Priority to DE1967M0072816 priority Critical patent/DE1614118C3/en
Priority to FR1568137D priority patent/FR1568137A/fr
Publication of DE1614118A1 publication Critical patent/DE1614118A1/en
Publication of DE1614118B2 publication Critical patent/DE1614118B2/en
Priority to US05/598,342 priority patent/US4063970A/en
Application granted granted Critical
Publication of DE1614118C3 publication Critical patent/DE1614118C3/en
Expired legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00Magnets
    • H01F7/02Permanent magnets [PM]
    • H01F7/0205Magnetic circuits with PM in general
    • H01F7/021Construction of PM
    • 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
    • H01F1/032Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • 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
    • H01F1/032Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/10Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
    • H01F1/11Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
    • 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
    • H01F1/032Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/10Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
    • H01F1/11Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
    • H01F1/113Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles in a bonding agent
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
    • H01F41/0286Trimming

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)

Description

H AGHETPABR Γ Κ BONN GmbH· vorm. Gewerkschaft WindhorstH AGHETPABR Γ Κ BONN GmbH Windhorst union

Patentanmeldung Anisotroper dauermagnetischer KörperPatent application Anisotropic permanent magnetic body

Die Erfindung betrifft einen anisotropen dauermagnet!sehen Körper, der aus einem Dauermagnetpulver und einem Bindemittel im Hagnetfeld gepresst wird.The invention relates to an anisotropic permanent magnet! See body, the one made of a permanent magnet powder and a binding agent in the magnetic field is pressed.

Die magnetischen Gütewerte der auf dieee an «loh bekannt· Wels« bisher hergestellten Dauermagnete liegen verhältnismäßig niedrig· Wird als Ausgangswerkstoff ein Bariujaferrit verwendet, so wurden bisher etwa folgende Werte bekannt:The magnetic quality values of the "loh known catfish" Permanent magnets manufactured up to now are relatively low. If a barium ferrite is used as the starting material, then so far the following values are known:

Br = ?.200 Gauß, BHC =1,480 Oersted, (Β.Η)Β&χ - 1,08.106 Ö.Oe,B r =? .200 Gauss, B H C = 1.480 Oersted, (Β.Η) Β & χ - 1.08.10 6 Ö.Oe,

und dieβ, obwohl Bariumferrit als ein "Werkstoff mit mögliohat hoher Koerzitivfeidstärke" für dieses Verfahren besonders geeignet sein soll (z.3. DAS 1 168 578). .and this, although barium ferrite can be used as a "material" high coercive force "is particularly suitable for this process should be (e.g. 3rd DAS 1 168 578). .

Der Erfinder hat eich die Aufgabe gestellt, die magnetischen Werte dieser Pressmagnete wesentlich zu verbessern· Dies ist ihm gelungen, nachdem er erkannt hat, auf welche Eigenschaften des Auegangewerkstoffes es ankommt, wenn hohe magnetische Werte des gepressten Zcrpers erreicht werden sollen.The inventor has set the task, the magnetic values to improve this press magnet significantly · He succeeded in doing this, after he has recognized which properties of the external material are important when high magnetic values of the pressed Zcrpers should be reached.

■»■ »

Erfindungsgemäß wird als Ausgangswerkstoff»für diesen anisotropen dauerma^netischen Körper, der aus anisotropem Magnetpulver mit einem Bindemittel im Magnetfeld gepresst wird, ein solcher verwendet, dessen Koerzitivfeldstärke jHq mindestens gleich der geforderten Remanenz des fertigen MagnetTcörpere ist, dessen Remanenz etwa das 1,3 bis 1,5 fache der geforderten Remanenz 41TJ„ des fertigen Magneten ist und dessen Ausbauchungsfaktor I421£äI]äSS größer als 0,6 ist.According to the invention, the starting material for this is anisotropic permanent body made of anisotropic magnetic powder with a binding agent is pressed in a magnetic field, such a binding agent is used, whose coercive field strength jHq is at least equal to that required The remanence of the finished magnet body is whose remanence is about 1.3 to 1.5 times the required remanence 41TJ “of the finished magnet and whose bulging factor I421 £ äI] äSS is greater than 0.6.

4<rjA 4 <rj A

009822/0568009822/0568

- 2- 2

BADBATH

Ein Beispiel für die Erfindung sei die Herstellung eines anisotropen Pressmagneten mit einem (B.H) - Wert von 1,6.10 G.O· und einer Remanenz B von 2.800 Gauß. Nach der Erfindung wurde ein Ausgangswerkstoff mit den Werten:An example of the invention is the production of an anisotropic Press magnets with a (B.H) value of 1.6.10 G.O and a remanence B of 2,800 Gauss. According to the invention, a Base material with the values:

Br * 1,3. 2.800 G = 3.800 G, rEn = 2.800 Oe1 B r * 1.3. 2,800 G = 3,800 G, r E n = 2,800 Oe 1

> 0,6 verwendet,> 0.6 used,

Entmagnetisierunsskurve in Bild 1 mit a bezeichnet ist· E1. wurd· zerkleinert, mit 3 Gewichtsprozent Kunststoffbindemittel vermischt und in einem Magnetfeld von 5.000 Oersted kalt zu einem Körper gepresst, der nach dem Herausnehmen der Pressform durch Erwärmen (ca. 1 Stunde in einem Ofen auf HO0C) verfestigt wurde, ohne dabei seine KaSe merklich zu verändern. An einem so hergestellten Körper wurde die in 3ild 1 mit b bezeichnete Kurve gerneaeentThe demagnetization curve in Figure 1 is labeled a · E 1 . was comminuted, mixed with 3 percent by weight plastic binder and pressed cold in a magnetic field of 5,000 Oersted to form a body which, after removing the mold , was solidified by heating (about 1 hour in an oven at HO 0 C) without its cheese to change noticeably. On a body produced in this way, the curve labeled b in Fig. 1 was shown

Br = 2.800 G, BHC = 1.900 G, (B-H)n^1x = 1,6e106 G.Oe.B r = 2,800 G, B H C = 1,900 G, (BH) n ^ 1x = 1.6 e 10 6 G.Oe.

Eamit wurden die bisher bekannten Werte für solche Presemagnete erheblich, überschritten und diesem Herstellungsverfahren viele Anwendungsir.öglichkeiten erschlossen.Thus the values known up to now for such presence magnets have become considerable, exceeded and this manufacturing process many possible uses opened up.

Zu der bisher bekannten Lehre steht die Verwendung dieses .Werkstoffee ala Ausgangswerkstoff für die Preasmagnetherstellung im Widerspruch· Nach der bekannten ^ehre soll ein Magnetwerkstoff w mit möglichst hoher ^oersLtivfeldstärke" verwendet werden, der auch bei geringer Remanenz jute magnetische Werte ergeben soll (z.B. DAS 1 168 578). Durch eine Herstellung des oben genannten Ausgangswerkstoffes bei einer niedrigeren Brenntemperatur könnte dieser mit höherer Koersitivfeldstärke jHq als 2.800 0·, zum Beispiel mit jHc β 4.000 - 5.000 0«,To the previously known teaching is the use of this .Werkstoffee ala starting material for Preasmagnetherstellung contradict · According to the known ^ honor to a magnetic material w are used with the highest possible ^ oersLtivfeldstärke ", is said to give the jute even at low remanence magnetic values (eg DAS 1 168 578). By producing the above-mentioned starting material at a lower firing temperature, it could have a higher coercive field strength jHq than 2,800 0 ·, for example with jH c β 4,000 - 5,000 0 «,

- 3 009822/056· - 3 009822/056

BADBATH

bei gleichzeitiger niedriger Remanenz ausgestattet werden (Kurve c in Bild 1)· Die damit hergestellten Preesmagnete zeigen aber wegen der niedrigen Remanenz wieder niedrigere magnetische Werte als das obige Beispiel b. Erst die Verwendung eines Ausgangewerkstoffes mit den vom Erfinder erkannten Eigenschaften brachte die wesentliche Verbesserung des magnetischen GUtewertes auf 1,6.10 G.Oe.with simultaneous low remanence (curve c in picture 1) · The Prees magnets manufactured with it show because of the low remanence again lower magnetic values than that example above b. Only the use of a starting material with the properties recognized by the inventor brought the significant improvement in the magnetic Gt value to 1.6.10 G.Oe.

Die Erfindung kann auch bei anderen Magnetwerkstoffen, zum Beispiel bei Alnico-Legierungen, bei Mn-Bi- oder Mn-Al-Legierun^en, bei Yttrium-Kobalt-Legierun^en Anwendung finden.The invention can also be applied to other magnetic materials, for example in Alnico alloys, in Mn-Bi- or Mn-Al alloys, at Yttrium-cobalt alloys find application.

BAD ORIGINAL 009822/0568 BATH ORIGINAL 009822/0568

Claims (3)

Patentansprüche 1614110Claims 1614110 1.) Anisotroper dauermagnet!scher Körper, der aus einem anisotropen Dauermagnetpulver und einem Sindemittel durch Fressen in einem Magnetfeld hergestellt wird, dessen Richtung mit der endgültigen Kagnetisierungsrichtung übereinstimmt, gekennzeichnet durch einen Ausgangswerkstoff, dessen Koerzitivfeidstärke ,Hq mindestens gleich der geforderten Remanenz des fertigen Kagnetkörpers ist, dessen Remanenz etwa das*1,3 bis 1,5 - fache der geforderten Remanenz des fertigen Kagnetkörpers1.) Anisotropic permanent magnet! Shear body, which consists of an anisotropic permanent magnet powder and a chemical by eating is produced in a magnetic field, the direction of which coincides with the final direction of magnetization, characterized by a starting material whose coercive force, Hq, is at least equal to the required remanence of the finished magnet body, the remanence of which is about * 1.3 to 1.5 times the required remanence of the finished magnet body ,5 g g gp, 5 g g gp ist und dessen Auabauchungsfaktor größer ale 0,6 ist.and whose expansion factor is greater than 0.6. 2.) Anisotroper dauermagnetischer Körper nach Anspruch 1, gekennzeichnet durch einen Auegangewerkstoff aus Eariu&ferrlt mit2.) Anisotropic permanent magnetic body according to claim 1, characterized by a Auegangewerkstoff from Eariu & ferrlt with - 2.800 Oe9 A Jp - 1,2 bis 1,6 χ 2.Θ00 G- 2,800 Oe 9 A J p - 1.2 to 1.6 χ 2.Θ00 G und > Of6.and> Of 6. 3.) Anisotroper dauernagnetischer Körper nach Anspruch 2, gekennzeichnet durch einen Ausgangswerkstoff aus Bariumferrit, bei dem das Barium teilweise oder ganz durch Sr oder Pb ersetzt ist.3.) Anisotropic permanent magnetic body according to claim 2, characterized by a starting material made of barium ferrite in which the barium has been partially or completely replaced by Sr or Pb. BADBATH 009822/0568009822/0568
DE1967M0072816 1967-02-18 1967-02-18 Process for producing an aminotropic permanent magnet body from an aminotropic permanent magnet powder Expired DE1614118C3 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE1967M0072816 DE1614118C3 (en) 1967-02-18 1967-02-18 Process for producing an aminotropic permanent magnet body from an aminotropic permanent magnet powder
FR1568137D FR1568137A (en) 1967-02-18 1968-02-16
US05/598,342 US4063970A (en) 1967-02-18 1975-07-23 Method of making permanent magnets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1967M0072816 DE1614118C3 (en) 1967-02-18 1967-02-18 Process for producing an aminotropic permanent magnet body from an aminotropic permanent magnet powder

Publications (3)

Publication Number Publication Date
DE1614118A1 true DE1614118A1 (en) 1970-05-27
DE1614118B2 DE1614118B2 (en) 1973-08-02
DE1614118C3 DE1614118C3 (en) 1980-01-17

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ID=7314684

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1967M0072816 Expired DE1614118C3 (en) 1967-02-18 1967-02-18 Process for producing an aminotropic permanent magnet body from an aminotropic permanent magnet powder

Country Status (2)

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DE (1) DE1614118C3 (en)
FR (1) FR1568137A (en)

Also Published As

Publication number Publication date
DE1614118C3 (en) 1980-01-17
FR1568137A (en) 1969-05-23
DE1614118B2 (en) 1973-08-02

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Legal Events

Date Code Title Description
SH Request for examination between 03.10.1968 and 22.04.1971
C3 Grant after two publication steps (3rd publication)
8320 Willingness to grant licences declared (paragraph 23)