FR2385476A1 - Procede de preparation de particules de fer ferromagnetiques aciculaires - Google Patents

Procede de preparation de particules de fer ferromagnetiques aciculaires

Info

Publication number
FR2385476A1
FR2385476A1 FR7809509A FR7809509A FR2385476A1 FR 2385476 A1 FR2385476 A1 FR 2385476A1 FR 7809509 A FR7809509 A FR 7809509A FR 7809509 A FR7809509 A FR 7809509A FR 2385476 A1 FR2385476 A1 FR 2385476A1
Authority
FR
France
Prior art keywords
iron particles
ferromagnetic iron
acicular
degrees
alkaline earth
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
FR7809509A
Other languages
English (en)
Other versions
FR2385476B1 (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.)
BASF SE
Original Assignee
BASF SE
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 BASF SE filed Critical BASF SE
Publication of FR2385476A1 publication Critical patent/FR2385476A1/fr
Application granted granted Critical
Publication of FR2385476B1 publication Critical patent/FR2385476B1/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/16—Making metallic powder or suspensions thereof using chemical processes
    • B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
    • B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
    • B22F9/22—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B15/00—Other processes for the manufacture of iron from iron compounds
    • 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
    • G11B5/714—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 dimension of the magnetic particles

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • General Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
  • Paints Or Removers (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

Procédé de préparation de particules de fer ferromagnétiques aciculaires ayant les propriétés désirées, par réduction d'hydrate d'oxyde ferrique aciculaire, présentant à sa surface un cation alcalino-terreux, choisi parmi le calcium, le strontium, et le baryum, et un anion d'un acide mono-, di- ou tri-carboxylique aliphatique, ayant jusqu'à 6 atomes de carbone, ou un composé organique renfermant au moins deux groupes capables de former des chélates avec le cation alcalino-terreux, avec de l'hydrogène, à une température comprise entre 275 degrés et 380 degrés C. L'hydrate d'oxyde ferrique aciculaire utilisé présente un rapport longueur/épaisseur d'au moins 15 et il renferme au moins 70 % en poids de lépidocrocite. Application à la fabrication de supports d'enregistrement magnétique.
FR7809509A 1977-04-01 1978-03-31 Procede de preparation de particules de fer ferromagnetiques aciculaires Granted FR2385476A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2714588A DE2714588C2 (de) 1977-04-01 1977-04-01 Verfahren zur Herstellung nadelförmiger ferromagnetischer Eisenteilchen

Publications (2)

Publication Number Publication Date
FR2385476A1 true FR2385476A1 (fr) 1978-10-27
FR2385476B1 FR2385476B1 (fr) 1983-02-04

Family

ID=6005364

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7809509A Granted FR2385476A1 (fr) 1977-04-01 1978-03-31 Procede de preparation de particules de fer ferromagnetiques aciculaires

Country Status (6)

Country Link
US (1) US4178171A (fr)
JP (1) JPS53123898A (fr)
DE (1) DE2714588C2 (fr)
FR (1) FR2385476A1 (fr)
GB (2) GB1597680A (fr)
NL (1) NL7803460A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0014889A1 (fr) * 1979-02-24 1980-09-03 BASF Aktiengesellschaft Procédé de préparation de particules de fer aciculaire ferromagnétique
EP0024692A2 (fr) * 1979-09-01 1981-03-11 BASF Aktiengesellschaft Procédé de préparation de particules aciculaires ferromagnétiques de fer, et leur application
EP0041727A1 (fr) * 1980-06-11 1981-12-16 Hitachi Maxell Ltd. Procédé de préparation de particules ferromagnétiques à base de fer métallique
EP0118254A1 (fr) * 1983-02-23 1984-09-12 Chisso Corporation Procédé de préparation de particules fines en métal ferromagnétique

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2815712A1 (de) * 1978-04-12 1979-10-25 Bayer Ag Eisenoxide zur magnetischen signalaufzeichnung und verfahren zu deren herstellung
DE2935358A1 (de) * 1979-09-01 1981-03-26 Basf Ag, 67063 Ludwigshafen Verfahren zur herstellung nadelfoermiger ferromagnetischer eisenteilchen und deren verwendung
JPS5677931A (en) * 1979-11-28 1981-06-26 Tdk Corp Magnetic recording medium and its producton
DE3021111A1 (de) 1980-06-04 1981-12-17 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von nadelfoermigen, im wesentlichen aus eisen bestehenden, ferromagnetischen metallteilchen
DE3026696A1 (de) 1980-07-15 1982-02-18 Basf Ag, 6700 Ludwigshafen Ferromagnetische, im wesentlichen aus eisen bestehende metallteilchen mit einem oberflaechenueberzug, verfahren zu deren herstellung sowie ihre verwendung zur herstellung von magnetischen aufzeichnungstraegern
DE3228669A1 (de) * 1982-07-31 1984-02-02 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung nadelfoermiger, im wesentlichen aus eisen bestehender ferromagnetischer metallteilchen
JPS6161404A (ja) * 1984-08-31 1986-03-29 Sony Corp 金属磁性粉末の製造方法
US10336648B1 (en) * 1986-03-21 2019-07-02 Alvin R. Stetson Slip composition
US4957644A (en) * 1986-05-13 1990-09-18 Price John T Magnetically controllable couplings containing ferrofluids
US4849120A (en) * 1986-05-13 1989-07-18 Price John T Magnetically controllable couplings containing ferrafluids
US5219554A (en) * 1986-07-03 1993-06-15 Advanced Magnetics, Inc. Hydrated biodegradable superparamagnetic metal oxides
US5069216A (en) * 1986-07-03 1991-12-03 Advanced Magnetics Inc. Silanized biodegradable super paramagnetic metal oxides as contrast agents for imaging the gastrointestinal tract
JPS6367704A (ja) * 1986-09-09 1988-03-26 Nissan Chem Ind Ltd 高分散性磁性鉄粉の製造方法
JPH06345437A (ja) * 1993-06-04 1994-12-20 Natl Sci Council γ−酸化鉄磁気粉末の製造方法
US8857603B1 (en) * 2013-06-20 2014-10-14 Alan Nippert System for adjusting conveyor direction

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2003247A1 (fr) * 1968-03-05 1969-11-07 Philips Nv
DE2434096A1 (de) * 1974-07-16 1976-02-05 Basf Ag Verfahren zur herstellung nadelfoermiger, eisenhaltiger ferromagnetischer metallpigmente
DE2434058A1 (de) * 1974-07-16 1976-02-05 Basf Ag Verfahren zur herstellung nadelfoermiger, eisenhaltiger ferromagnetischer metallpigmente

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1219009B (de) * 1963-06-26 1966-06-16 Bayer Ag Verfahren zur Herstellung von gamma-FeOOH
US3904540A (en) * 1972-02-11 1975-09-09 Pfizer Magnetic impulse record member
DE2249274A1 (de) * 1972-10-07 1974-04-18 Bayer Ag Herstellung von gefaelltem rotem eisen(iii)-oxid
US4066726A (en) * 1972-11-18 1978-01-03 Gottfried Mehnert Multi-stage method of blow molding hollow shaped articles
JPS5024799A (fr) * 1973-07-04 1975-03-17

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2003247A1 (fr) * 1968-03-05 1969-11-07 Philips Nv
DE2434096A1 (de) * 1974-07-16 1976-02-05 Basf Ag Verfahren zur herstellung nadelfoermiger, eisenhaltiger ferromagnetischer metallpigmente
DE2434058A1 (de) * 1974-07-16 1976-02-05 Basf Ag Verfahren zur herstellung nadelfoermiger, eisenhaltiger ferromagnetischer metallpigmente

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0014889A1 (fr) * 1979-02-24 1980-09-03 BASF Aktiengesellschaft Procédé de préparation de particules de fer aciculaire ferromagnétique
EP0024692A2 (fr) * 1979-09-01 1981-03-11 BASF Aktiengesellschaft Procédé de préparation de particules aciculaires ferromagnétiques de fer, et leur application
EP0024692A3 (en) * 1979-09-01 1981-08-26 Basf Aktiengesellschaft Process for preparing acicular ferromagnetic iron particles, and their use
EP0041727A1 (fr) * 1980-06-11 1981-12-16 Hitachi Maxell Ltd. Procédé de préparation de particules ferromagnétiques à base de fer métallique
EP0118254A1 (fr) * 1983-02-23 1984-09-12 Chisso Corporation Procédé de préparation de particules fines en métal ferromagnétique

Also Published As

Publication number Publication date
US4178171A (en) 1979-12-11
DE2714588C2 (de) 1986-06-05
NL7803460A (nl) 1978-10-03
FR2385476B1 (fr) 1983-02-04
JPS6217362B2 (fr) 1987-04-17
DE2714588A1 (de) 1978-10-12
JPS53123898A (en) 1978-10-28
GB1597679A (en) 1981-09-09
GB1597680A (en) 1981-09-09

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