DE455542C - Process for the production of magnetic cores from finely divided iron with the addition of electrical insulating materials - Google Patents

Process for the production of magnetic cores from finely divided iron with the addition of electrical insulating materials

Info

Publication number
DE455542C
DE455542C DED50249D DED0050249D DE455542C DE 455542 C DE455542 C DE 455542C DE D50249 D DED50249 D DE D50249D DE D0050249 D DED0050249 D DE D0050249D DE 455542 C DE455542 C DE 455542C
Authority
DE
Germany
Prior art keywords
insulating materials
finely divided
production
magnetic cores
electrical insulating
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
DED50249D
Other languages
German (de)
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.)
KABELWERKE AKT GES DEUTSCHE
Original Assignee
KABELWERKE AKT GES DEUTSCHE
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 KABELWERKE AKT GES DEUTSCHE filed Critical KABELWERKE AKT GES DEUTSCHE
Priority to DED50249D priority Critical patent/DE455542C/en
Application granted granted Critical
Publication of DE455542C publication Critical patent/DE455542C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
    • G11B5/70636—CrO2

Landscapes

  • Soft Magnetic Materials (AREA)

Description

Verfahren zur Herstellung von 1Vlagnetkernen aus fein verteiltem Eisen unter Beimischung von elektrischen Isolierstoffen. Es ist bekannt, Magnetkerne mit hohem elektrischen Widerstand durch Zusammenpressen von fein verteiltem Eisen mit ferromagnetischen Eisenoxyden herzustellen. Die letzteren sollen die Eisenteilchen voneinander isolieren, um Wirbelströme zu verhüten, und gleichzeitig infolge ihrer ferromagnetischen Eigenschaften Brücken für die magnetischen Kraftlinien bilden.Process for the production of magnetic cores from finely divided iron with the addition of electrical insulating materials. It is known to have magnetic cores high electrical resistance due to the compression of finely divided iron with to produce ferromagnetic iron oxides. The latter are said to be the iron particles isolate from each other to prevent eddy currents, and at the same time as a result of them ferromagnetic properties form bridges for the magnetic lines of force.

Erfindungsgemäß werden jedoch für diesen Zweck die magnetischen Chromoxyde mit besonders gutem Erfolge verwendet, die man z. B. durch Erhitzen von Chromsäure erhält. Sie bilden ein Pulver von außerordentlicher Feinheit, so daß man zur Isolierung nur etwa 6 bis 8 Prozent desselben dem Eisenpulver zuzusetzen braucht. Man erhält auf diese Weise magnetische Pulver, welche den unter Zuhilfenahme von nichtferromagnetischen Isolierstoffen hergestellten in besonders hohem Maße überlegen sind.According to the invention, however, the magnetic chromium oxides are used for this purpose used with particularly good success that z. B. by heating chromic acid receives. They form a powder of extraordinary fineness, so that one for isolation only need to add about 6 to 8 percent of the same to the iron powder. You get in this way magnetic powder, which with the help of non-ferromagnetic Insulating materials produced are particularly superior to a particularly high degree.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Magnetkernen aus fein verteiltem Eisen unter Beimischung von elektrischen Isolierstoffen, dadurch gekennzeichnet, daß den Eisenteilchen als Isolierstoffe fein verteilte ferromagnetische Chromoxyde zugesetzt werden.PATENT CLAIM: Process for the production of magnetic cores from fine distributed iron with the admixture of electrical insulating materials, characterized in that that the iron particles are finely divided ferromagnetic chromium oxides as insulating materials can be added.
DED50249D 1926-04-17 1926-04-17 Process for the production of magnetic cores from finely divided iron with the addition of electrical insulating materials Expired DE455542C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED50249D DE455542C (en) 1926-04-17 1926-04-17 Process for the production of magnetic cores from finely divided iron with the addition of electrical insulating materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED50249D DE455542C (en) 1926-04-17 1926-04-17 Process for the production of magnetic cores from finely divided iron with the addition of electrical insulating materials

Publications (1)

Publication Number Publication Date
DE455542C true DE455542C (en) 1928-02-03

Family

ID=7052497

Family Applications (1)

Application Number Title Priority Date Filing Date
DED50249D Expired DE455542C (en) 1926-04-17 1926-04-17 Process for the production of magnetic cores from finely divided iron with the addition of electrical insulating materials

Country Status (1)

Country Link
DE (1) DE455542C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1025536B (en) * 1955-05-31 1958-03-06 Siemens Ag Process for the production of a soft magnetic sintered body with high permeability and small eddy current losses

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1025536B (en) * 1955-05-31 1958-03-06 Siemens Ag Process for the production of a soft magnetic sintered body with high permeability and small eddy current losses

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