FR2003248A1 - - Google Patents

Info

Publication number
FR2003248A1
FR2003248A1 FR6905884A FR6905884A FR2003248A1 FR 2003248 A1 FR2003248 A1 FR 2003248A1 FR 6905884 A FR6905884 A FR 6905884A FR 6905884 A FR6905884 A FR 6905884A FR 2003248 A1 FR2003248 A1 FR 2003248A1
Authority
FR
France
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.)
Withdrawn
Application number
FR6905884A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of FR2003248A1 publication Critical patent/FR2003248A1/fr
Withdrawn legal-status Critical Current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
    • G11B5/70605—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 metals or alloys
    • G11B5/70615—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 metals or alloys containing Fe metal or alloys
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets 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
    • H01F1/04—Magnets 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
    • H01F1/06—Magnets 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 in the form of particles, e.g. powder
    • H01F1/065—Magnets 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 in the form of particles, e.g. powder obtained by a reduction
FR6905884A 1968-03-05 1969-03-04 Withdrawn FR2003248A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6803123A NL6803123A (fr) 1968-03-05 1968-03-05

Publications (1)

Publication Number Publication Date
FR2003248A1 true FR2003248A1 (fr) 1969-11-07

Family

ID=19802944

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6905884A Withdrawn FR2003248A1 (fr) 1968-03-05 1969-03-04

Country Status (7)

Country Link
US (1) US3607219A (fr)
AT (1) AT306763B (fr)
BE (1) BE729304A (fr)
CH (1) CH515331A (fr)
FR (1) FR2003248A1 (fr)
GB (1) GB1204991A (fr)
NL (1) NL6803123A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2482944A1 (fr) * 1980-05-23 1981-11-27 Ampex Procede de reduction d'oxyde de fer economisant l'hydrogene

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4922630B1 (fr) * 1970-06-23 1974-06-10
US4207092A (en) * 1977-03-03 1980-06-10 E. I. Du Pont De Nemours And Company Acicular α-iron particles, their preparation and recording media employing same
JPS5813008B2 (ja) * 1977-10-06 1983-03-11 日本ビクター株式会社 磁性鉄粉の製造方法
US4310349A (en) * 1979-02-02 1982-01-12 Ampex Corporation Highly orientable iron particles
US4273807A (en) * 1979-03-19 1981-06-16 E. I. Du Pont De Nemours And Company Acicular α-iron particles and recording media employing same
US4318734A (en) * 1980-02-25 1982-03-09 Ampex Corporation Reduction of iron oxide utilizing dehydrating agent
JPS5980901A (ja) * 1982-11-01 1984-05-10 Fuji Photo Film Co Ltd 強磁性金属粉末の製造法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3005701A (en) * 1957-10-15 1961-10-24 Bethlehem Steel Corp Method of making melting stock by direct reduction
US3347659A (en) * 1965-05-19 1967-10-17 Hydrocarbon Research Inc Process of reducing iron oxide

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2482944A1 (fr) * 1980-05-23 1981-11-27 Ampex Procede de reduction d'oxyde de fer economisant l'hydrogene

Also Published As

Publication number Publication date
CH515331A (de) 1971-11-15
BE729304A (fr) 1969-09-03
NL6803123A (fr) 1969-09-09
DE1906531A1 (de) 1969-10-02
DE1906531B2 (de) 1977-01-20
US3607219A (en) 1971-09-21
GB1204991A (en) 1970-09-09
AT306763B (de) 1973-04-25

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Legal Events

Date Code Title Description
ST Notification of lapse