FR2404289A1 - Particules metalliques ferromagnetiques composees essentiellement de fer, et procede pour leur preparation - Google Patents

Particules metalliques ferromagnetiques composees essentiellement de fer, et procede pour leur preparation

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Publication number
FR2404289A1
FR2404289A1 FR7827686A FR7827686A FR2404289A1 FR 2404289 A1 FR2404289 A1 FR 2404289A1 FR 7827686 A FR7827686 A FR 7827686A FR 7827686 A FR7827686 A FR 7827686A FR 2404289 A1 FR2404289 A1 FR 2404289A1
Authority
FR
France
Prior art keywords
particles
iron
preparation
metal particles
ferromagnetic metal
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
FR7827686A
Other languages
English (en)
Other versions
FR2404289B1 (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 FR2404289A1 publication Critical patent/FR2404289A1/fr
Application granted granted Critical
Publication of FR2404289B1 publication Critical patent/FR2404289B1/fr
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/02—Making ferrous alloys by powder metallurgy
    • C22C33/0207—Using a mixture of prealloyed powders or a master alloy
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/16—Metallic particles coated with a non-metal
    • 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
    • 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
    • H01F1/061—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 with a protective layer
    • 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

Landscapes

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

Abstract

La présente invention a pour objet des particules ferromagnétiques composées essentiellement de fer, se distinguant par une distribution étroite des grosseurs de particules et une forme aciculaire prononcée, ainsi qu'un procéde de préparation de ces particules par réduction d'oxydes de fer aciculaires au moyen d'agents réducteurs gazeux. Selon l'invention, la surface des particules renferme du bore sous forme de borate en une proportion comprise entre 0,02 et 0,6 % en poids de bore, rapportée à la teneur en métal des particules. Emploi des particules métalliques dans la fabrication de supports d'enregistrement magnétiques.
FR7827686A 1977-09-27 1978-09-27 Particules metalliques ferromagnetiques composees essentiellement de fer, et procede pour leur preparation Expired FR2404289B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772743298 DE2743298A1 (de) 1977-09-27 1977-09-27 Ferromagnetische, im wesentlichen aus eisen bestehende metallteilchen und verfahren zu deren herstellung

Publications (2)

Publication Number Publication Date
FR2404289A1 true FR2404289A1 (fr) 1979-04-20
FR2404289B1 FR2404289B1 (fr) 1985-11-22

Family

ID=6019938

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7827686A Expired FR2404289B1 (fr) 1977-09-27 1978-09-27 Particules metalliques ferromagnetiques composees essentiellement de fer, et procede pour leur preparation

Country Status (5)

Country Link
JP (1) JPS5457459A (fr)
DE (1) DE2743298A1 (fr)
FR (1) FR2404289B1 (fr)
GB (1) GB2007113B (fr)
NL (1) NL7809655A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105110A2 (fr) * 1982-07-31 1984-04-11 BASF Aktiengesellschaft Procédé de préparation de particules métalliques aciculaires ferromagnétiques composées essentiellement de fer

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
US4310349A (en) * 1979-02-02 1982-01-12 Ampex Corporation Highly orientable iron particles
US4316738A (en) * 1979-02-02 1982-02-23 Ampex Corporation Economical process for producing metal particles for magnetic recording
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
DE3048086A1 (de) * 1980-12-19 1982-07-15 Bayer Ag, 5090 Leverkusen Agglomerierte ferromagnetische eisenteilchen
JPS5848612A (ja) * 1981-09-18 1983-03-22 Mitsui Toatsu Chem Inc 強磁性鉄粉の製造方法
JPS5848611A (ja) * 1981-09-18 1983-03-22 Mitsui Toatsu Chem Inc 強磁性鉄粉体の製造方法
DE3228659A1 (de) * 1982-07-31 1984-02-02 Bayer Ag, 5090 Leverkusen Verfahren zur herstellung von cobalt-epitaxial-beschichteten eisenoxiden fuer die magnetaufzeichnung
US4437881A (en) * 1982-07-31 1984-03-20 Toda Kogyo Corp. Acicular ferromagnetic alloy particles and process for producing said particles
JPS5953601A (ja) * 1982-08-24 1984-03-28 Dainippon Ink & Chem Inc 安定な強磁性金属粉末の製造方法
DE3300592C2 (de) * 1983-01-11 1985-11-21 Mitsui Toatsu Chemicals, Inc., Tokio/Tokyo Verfahren zur Erzeugung von ferromagnetischem Eisenpulver
JP2582764B2 (ja) * 1986-02-05 1997-02-19 バスフ アクチェン ゲゼルシャフト 本質的に鉄から成る針状強磁性金属粉末の製造方法
US6989556B2 (en) 2002-06-06 2006-01-24 Osemi, Inc. Metal oxide compound semiconductor integrated transistor devices with a gate insulator structure
US8911663B2 (en) 2009-03-05 2014-12-16 Quebec Metal Powders, Ltd. Insulated iron-base powder for soft magnetic applications

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2503947A (en) * 1947-03-10 1950-04-11 Comm Engineering Pty Ltd Method of molidng magnetic powder
FR1587959A (fr) * 1967-11-25 1970-04-03
FR2014221A1 (fr) * 1968-06-25 1970-04-17 Du Pont
FR2014222A1 (fr) * 1968-06-25 1970-04-17 Du Pont
FR2185827A1 (fr) * 1972-05-22 1974-01-04 Minnesota Mining & Mfg
FR2309647A1 (fr) * 1975-01-13 1976-11-26 Graham Magnetics Inc Nouvelles poudres metalliques munies d'un revetement mineral protecteur et produits a base de ces poudres

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2974104A (en) * 1955-04-08 1961-03-07 Gen Electric High-energy magnetic material
DE2243231C2 (de) * 1972-09-01 1982-01-28 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von Cobalt-dotiertem γ-Eisen(III)oxid

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2503947A (en) * 1947-03-10 1950-04-11 Comm Engineering Pty Ltd Method of molidng magnetic powder
FR1587959A (fr) * 1967-11-25 1970-04-03
FR2014221A1 (fr) * 1968-06-25 1970-04-17 Du Pont
FR2014222A1 (fr) * 1968-06-25 1970-04-17 Du Pont
FR2185827A1 (fr) * 1972-05-22 1974-01-04 Minnesota Mining & Mfg
FR2309647A1 (fr) * 1975-01-13 1976-11-26 Graham Magnetics Inc Nouvelles poudres metalliques munies d'un revetement mineral protecteur et produits a base de ces poudres

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105110A2 (fr) * 1982-07-31 1984-04-11 BASF Aktiengesellschaft Procédé de préparation de particules métalliques aciculaires ferromagnétiques composées essentiellement de fer
EP0105110A3 (en) * 1982-07-31 1985-11-21 Basf Aktiengesellschaft Process for producing acicular ferromagnetic metal particles essentially consisting of iron

Also Published As

Publication number Publication date
JPS5457459A (en) 1979-05-09
DE2743298C2 (fr) 1989-10-12
GB2007113A (en) 1979-05-16
GB2007113B (en) 1982-01-20
DE2743298A1 (de) 1979-04-05
FR2404289B1 (fr) 1985-11-22
NL7809655A (nl) 1979-03-29

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