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FR1024642A - Manufacturing process of magnetizable materials - Google Patents

Manufacturing process of magnetizable materials

Info

Publication number
FR1024642A
FR1024642A FR1024642DA FR1024642A FR 1024642 A FR1024642 A FR 1024642A FR 1024642D A FR1024642D A FR 1024642DA FR 1024642 A FR1024642 A FR 1024642A
Authority
FR
France
Prior art keywords
manufacturing process
magnetizable materials
magnetizable
materials
manufacturing
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
Other languages
French (fr)
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries Ltd
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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Application granted granted Critical
Publication of FR1024642A publication Critical patent/FR1024642A/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
    • G11B5/70642—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 iron oxides
    • G11B5/70652—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 iron oxides gamma - Fe2 O3
    • G11B5/70668—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 iron oxides gamma - Fe2 O3 containing a dopant
FR1024642D 1949-09-21 1950-09-15 Manufacturing process of magnetizable materials Expired FR1024642A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1024642X 1949-09-21

Publications (1)

Publication Number Publication Date
FR1024642A true FR1024642A (en) 1953-04-03

Family

ID=10868782

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1024642D Expired FR1024642A (en) 1949-09-21 1950-09-15 Manufacturing process of magnetizable materials

Country Status (1)

Country Link
FR (1) FR1024642A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1202206B (en) * 1962-09-28 1965-09-30 Siemens Ag Use of iron (II) chloride waste solutions for the production of ferromagnetic ferrites
EP0371384A2 (en) * 1988-12-01 1990-06-06 Ishihara Sangyo Kaisha, Ltd. Process for producing magnetic iron oxide particles for magnetic recording

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1202206B (en) * 1962-09-28 1965-09-30 Siemens Ag Use of iron (II) chloride waste solutions for the production of ferromagnetic ferrites
EP0371384A2 (en) * 1988-12-01 1990-06-06 Ishihara Sangyo Kaisha, Ltd. Process for producing magnetic iron oxide particles for magnetic recording
EP0371384A3 (en) * 1988-12-01 1991-04-17 Ishihara Sangyo Kaisha, Ltd. Process for producing magnetic iron oxide particles for magnetic recording

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