DE927259C - Oxydic ferromagnetic material - Google Patents

Oxydic ferromagnetic material

Info

Publication number
DE927259C
DE927259C DEA17888A DEA0017888A DE927259C DE 927259 C DE927259 C DE 927259C DE A17888 A DEA17888 A DE A17888A DE A0017888 A DEA0017888 A DE A0017888A DE 927259 C DE927259 C DE 927259C
Authority
DE
Germany
Prior art keywords
oxide
oxydic
ferromagnetic material
barium
iron oxide
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
DEA17888A
Other languages
German (de)
Inventor
Hermann Dr Fahlenbrach
Walter Dr-Ing Heister
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.)
Aktiengesellschaft fuer Unternehmungen der Eisen und Stahlindustrie
Original Assignee
Aktiengesellschaft fuer Unternehmungen der Eisen und Stahlindustrie
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 Aktiengesellschaft fuer Unternehmungen der Eisen und Stahlindustrie filed Critical Aktiengesellschaft fuer Unternehmungen der Eisen und Stahlindustrie
Priority to DEA17888A priority Critical patent/DE927259C/en
Application granted granted Critical
Publication of DE927259C publication Critical patent/DE927259C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2608—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead
    • C04B35/2633—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead containing barium, strontium or calcium

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Hard Magnetic Materials (AREA)

Description

Oxydischer ferromagnetischer Werkstoff Es ist bereits ein ferromagnetischer Werkstoff vorgeschlagen worden, der 5 bis 6o Molprozent Bariumferrit enthält und im übrigen in der Hauptsache aus einem oder mehreren anderen ferromagnetischen oxydischen Stoffen besteht. Insbesondere kann ein solcher für die Herstellung von Dauermagneten geeigneter Werkstoff aus Bariumoxyd und Eisenoxyd zusammengesetzt werden, und zwar beispielsweise aus 6o bis, 95 Gewichtsprozent, vorzugsweise 75 bis go Cxewichtsprozent Eisenoxyd und Rest Bariumoxyd. Besonders günstig ist die Zusammensetzung aus 83 Gewichtsprozent Eisenoxyd und 17 Gewichtsprozent Bariumoxyd.Oxydic ferromagnetic material A ferromagnetic material has already been proposed which contains 5 to 60 mole percent barium ferrite and otherwise mainly consists of one or more other ferromagnetic oxidic substances. In particular, such a material suitable for the production of permanent magnets can be composed of barium oxide and iron oxide, for example from 60 to 95 percent by weight, preferably 75 to 20 percent by weight of iron oxide and the remainder of barium oxide. The composition of 83 percent by weight of iron oxide and 17 percent by weight of barium oxide is particularly favorable.

Es hat sich nun gezeigt, daß ein Teil des Eisenoxyds durch Manganoxyd ersetzt werden kann, und zwar iist es vorteiihaft, bei der Zusammensetzung des angegebenen ferromagnetischen Werkstoffs etwa i bis io%, vorzugsweise 2 bis 5% Manganoxyd an Stelle der entsprechenden Menge Eisenoxyd zu verwenden. Durch ,die Verwendung des Manganoxyds kann eine Steigerung der Remanenz um einen Betrag bis zu etwa 3oo bis 5oo Gauß erzielt werden.It has now been shown that part of the iron oxide is replaced by manganese oxide can be replaced, and it is advantageous in the composition of the specified ferromagnetic material about i to io%, preferably 2 to 5% manganese oxide Place the appropriate amount of iron oxide to be used. By using the Manganoxyds can increase the remanence by an amount up to about 3oo to 500 Gauss can be achieved.

Weiter hat sich gezeigt, daß das Eisenoxyd in dem ferromagnetischen Werkstoff auch durch Chromoxyd ersetzt werden kann. Der Zusatz von Chromoxyd kann etwa 2 bis 2o%, vorzugsweise etwa q. bns 8%, betragen. Durch Verwendung des Chromoxyds wird eine Steigerung der Koerzitivkraft um etwa bis zu 300 Orstedt erzielt.It has also been shown that the iron oxide in the ferromagnetic material can also be replaced by chromium oxide. The addition of chromium oxide can be about 2 to 2o%, preferably about q. bns 8%. The use of chromium oxide increases the coercive force by up to 300 Orstedt.

Das aus Eisenoxyd, Bariumoxyd und Manganoxyd oder Chromoxyd bestehende pulverförmige Ausgangsgemisch wird beispielsweise etwa 2 Stunden bei zioo° C gesintert. Der so hergestellte Werkstoff ist zur Herstellung von Dauermagneten hervorragend geeignet.That consisting of iron oxide, barium oxide and manganese oxide or chromium oxide powdery starting mixture is sintered for about 2 hours at zioo ° C, for example. The one made in this way Material is used to manufacture permanent magnets excellently suited.

Claims (3)

PATENTANSPRÜCHE: i. Oxydischer ferromagnefiseher, Bariumferrit enthaltender Werkstoff, dadurch gekennzeichnet, daß er aus Eisenoxyd, Bariumoxyd und Manganoxyd oder Chromoxyd zusammengesetzt ist. PATENT CLAIMS: i. Oxydic ferromagnetic, containing barium ferrite Material, characterized in that it is made of iron oxide, barium oxide and manganese oxide or chromium oxide is composed. 2. Werkstoff nach Anspruch i, dadurch gekennzeichnet, daß er aus 5 bis q.00/0, vorzugsweise io bis 2511/0 Bariurnoxyd, i bis io0%, vorzugsweise 2 bis -5% Manganoxyd und aus Eisenoxyd zusammengesetzt ist. 2. Material according to claim i, characterized in that that it consists of 5 to 100/0, preferably 10 to 2511/0 barium oxide, 1 to 10%, preferably 2 to -5% manganese oxide and composed of iron oxide. 3. Werkstoff nach Anspruch i, dadurch gekennzeichnet, daB er aus 5 bis q.00/0, vorzugsweise io bis 25% Bariumoxyd, 2 bis 20%, vorzugsweise q. bis 8% Chromoxyd und aus Eisenoxyd zusammengesetzt ist. q.. Die Verwendung des Werkstoffs nach Anspruch i bis 3 zur Herstellung von Dauermagneten.3. Material according to claim i, characterized in that it consists of 5 to q.00 / 0, preferably 10 to 25% barium oxide, 2 to 20%, preferably q. up to 8% chromium oxide and composed of iron oxide. q .. The use of the material according to claims i to 3 for the production of permanent magnets.
DEA17888A 1953-04-26 1953-04-26 Oxydic ferromagnetic material Expired DE927259C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA17888A DE927259C (en) 1953-04-26 1953-04-26 Oxydic ferromagnetic material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA17888A DE927259C (en) 1953-04-26 1953-04-26 Oxydic ferromagnetic material

Publications (1)

Publication Number Publication Date
DE927259C true DE927259C (en) 1955-05-02

Family

ID=6924009

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA17888A Expired DE927259C (en) 1953-04-26 1953-04-26 Oxydic ferromagnetic material

Country Status (1)

Country Link
DE (1) DE927259C (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2946753A (en) * 1955-08-10 1960-07-26 Philips Corp Ferromagnetic material
US2946752A (en) * 1955-08-10 1960-07-26 Philips Corp Ferromagnetic material
US2955085A (en) * 1955-08-10 1960-10-04 Philips Corp Ferrites of decreased initial permeability at high frequencies
US2977312A (en) * 1956-05-16 1961-03-28 Philips Corp Ferromagnetic material
US2997443A (en) * 1955-03-03 1961-08-22 Plessey Co Ltd Modified nickel ferrite
US3013976A (en) * 1956-06-02 1961-12-19 Philips Corp Method of producing anisotropic ferromagnetic bodies from ferromagnetic material having a non-cubic crystal structure
US3036008A (en) * 1956-12-24 1962-05-22 Magneco Electronics Inc Permanent magnet ferrite
US3043776A (en) * 1957-04-18 1962-07-10 Philips Corp Ferromagnetic oxidic material

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2997443A (en) * 1955-03-03 1961-08-22 Plessey Co Ltd Modified nickel ferrite
US2946753A (en) * 1955-08-10 1960-07-26 Philips Corp Ferromagnetic material
US2946752A (en) * 1955-08-10 1960-07-26 Philips Corp Ferromagnetic material
US2955085A (en) * 1955-08-10 1960-10-04 Philips Corp Ferrites of decreased initial permeability at high frequencies
US2977312A (en) * 1956-05-16 1961-03-28 Philips Corp Ferromagnetic material
US3013976A (en) * 1956-06-02 1961-12-19 Philips Corp Method of producing anisotropic ferromagnetic bodies from ferromagnetic material having a non-cubic crystal structure
US3036008A (en) * 1956-12-24 1962-05-22 Magneco Electronics Inc Permanent magnet ferrite
US3043776A (en) * 1957-04-18 1962-07-10 Philips Corp Ferromagnetic oxidic material

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