GB2007113B - Acicular ferromagnetic metal particles essentially containing iron and their manufacture - Google Patents

Acicular ferromagnetic metal particles essentially containing iron and their manufacture

Info

Publication number
GB2007113B
GB2007113B GB7838119A GB7838119A GB2007113B GB 2007113 B GB2007113 B GB 2007113B GB 7838119 A GB7838119 A GB 7838119A GB 7838119 A GB7838119 A GB 7838119A GB 2007113 B GB2007113 B GB 2007113B
Authority
GB
United Kingdom
Prior art keywords
manufacture
metal particles
ferromagnetic metal
containing iron
essentially containing
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
GB7838119A
Other versions
GB2007113A (en
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 GB2007113A publication Critical patent/GB2007113A/en
Application granted granted Critical
Publication of GB2007113B publication Critical patent/GB2007113B/en
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)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Power Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Paints Or Removers (AREA)
  • Powder Metallurgy (AREA)
GB7838119A 1977-09-27 1978-09-26 Acicular ferromagnetic metal particles essentially containing iron and their manufacture Expired GB2007113B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772743298 DE2743298A1 (en) 1977-09-27 1977-09-27 FERROMAGNETIC METAL PARTS CONSISTING MAINLY OF IRON AND THE PROCESS FOR THEIR PRODUCTION

Publications (2)

Publication Number Publication Date
GB2007113A GB2007113A (en) 1979-05-16
GB2007113B true GB2007113B (en) 1982-01-20

Family

ID=6019938

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7838119A Expired GB2007113B (en) 1977-09-27 1978-09-26 Acicular ferromagnetic metal particles essentially containing iron and their manufacture

Country Status (5)

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

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2815712A1 (en) 1978-04-12 1979-10-25 Bayer Ag IRON OXIDES FOR MAGNETIC SIGNAL RECORDING AND PROCESS FOR THEIR PRODUCTION
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 (en) 1980-06-04 1981-12-17 Basf Ag, 6700 Ludwigshafen METHOD FOR THE PRODUCTION OF NEEDLE-SHAPED, FERROMAGNETIC METAL PARTICLES, ESSENTIALLY made of IRON
DE3026696A1 (en) * 1980-07-15 1982-02-18 Basf Ag, 6700 Ludwigshafen FERROMAGNETIC, PARTICULARLY IRON METAL PARTICLES WITH A SURFACE COVER, METHOD FOR THE PRODUCTION THEREOF AND THEIR USE FOR THE PRODUCTION OF MAGNETIC RECORDING CARRIERS
DE3048086A1 (en) * 1980-12-19 1982-07-15 Bayer Ag, 5090 Leverkusen AGGLOMERED FERROMAGNETIC IRON PARTICLES
JPS5848611A (en) * 1981-09-18 1983-03-22 Mitsui Toatsu Chem Inc Production of ferromagnetic iron powder
JPS5848612A (en) * 1981-09-18 1983-03-22 Mitsui Toatsu Chem Inc Production of ferromagnetic iron powder
DE3228659A1 (en) * 1982-07-31 1984-02-02 Bayer Ag, 5090 Leverkusen METHOD FOR PRODUCING COBALT-EPITAXIAL-COATED IRON OXIDES FOR MAGNETIC RECORDING
US4437881A (en) * 1982-07-31 1984-03-20 Toda Kogyo Corp. Acicular ferromagnetic alloy particles and process for producing said particles
DE3228669A1 (en) * 1982-07-31 1984-02-02 Basf Ag, 6700 Ludwigshafen METHOD FOR PRODUCING NEEDLE-SHAPED FERROMAGNETIC METAL PARTICLES, ESSENTIALLY IRON
JPS5953601A (en) * 1982-08-24 1984-03-28 Dainippon Ink & Chem Inc Manufacture of stable ferromagnetic metallic powder
DE3300592C2 (en) * 1983-01-11 1985-11-21 Mitsui Toatsu Chemicals, Inc., Tokio/Tokyo Process for the production of ferromagnetic iron powder
JP2582764B2 (en) * 1986-02-05 1997-02-19 バスフ アクチェン ゲゼルシャフト Method for producing acicular ferromagnetic metal powder consisting essentially of iron
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

Family Cites Families (8)

* 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
US2974104A (en) * 1955-04-08 1961-03-07 Gen Electric High-energy magnetic material
FR1587959A (en) * 1967-11-25 1970-04-03
DE1931664B2 (en) * 1968-06-25 1971-04-15 E I Du Pont de Nemours and Co , Wilmington, Del (V St A ) FERROMAGNETIC PARTICLES
US3567525A (en) * 1968-06-25 1971-03-02 Du Pont Heat treated ferromagnetic particles
US3865627A (en) * 1972-05-22 1975-02-11 Minnesota Mining & Mfg Magnetic recording medium incorporating fine acicular iron-based particles
DE2243231C2 (en) * 1972-09-01 1982-01-28 Basf Ag, 6700 Ludwigshafen Process for the preparation of cobalt-doped γ-iron (III) oxide
US4092459A (en) * 1975-01-13 1978-05-30 Graham Magnetics Incorporated Powder products

Also Published As

Publication number Publication date
FR2404289B1 (en) 1985-11-22
FR2404289A1 (en) 1979-04-20
DE2743298C2 (en) 1989-10-12
NL7809655A (en) 1979-03-29
GB2007113A (en) 1979-05-16
JPS5457459A (en) 1979-05-09
DE2743298A1 (en) 1979-04-05

Similar Documents

Publication Publication Date Title
JPS55125205A (en) Ferromagnetic metal pigment comprising essentially iron and method
GB2007113B (en) Acicular ferromagnetic metal particles essentially containing iron and their manufacture
JPS5348013A (en) Producing method of ferro magnetic metal particles composed of mainly iron
JPS53123898A (en) Method of making needleeshaped ferromagnetic iron particles
JPS5360399A (en) Cobalttdoped acicular permagnetite particle
JPS53100197A (en) Method of making acicular cobaltt containing magnetic iron oxide
JPS53133582A (en) Compound powder particle and manufacture thereof
JPS54152699A (en) Magnetic needleelike nonnstoichiometric ferrous and ferric oxide particle and its manufacture
JPS5376957A (en) Magnetic metal iron powder and said manufacturing process
DE3065058D1 (en) Process for preparing ferromagnetic acicular iron particles, and their use
AU534438B2 (en) Magnetic metal and alloy pigments
JPS5690903A (en) Metal powder and method
DE3067268D1 (en) Process for preparing acicular ferromagnetic iron particles, and their use
JPS53139518A (en) Magnetic tape and making method thereof
EP0105110A3 (en) Process for producing acicular ferromagnetic metal particles essentially consisting of iron
JPS5451532A (en) Magnetic toner and production thereof
JPS5613454A (en) Ductile magnetic alloy and production
JPS5376958A (en) Metal magnetic powder and said manufacturing process
GB8318707D0 (en) Producing cobalt and ferrous iron
DE3061463D1 (en) Method for the preparation of acicular ferromagnetic iron particles
JPS5681638A (en) Sintering of fine iron ore particle
JPS5682848A (en) Magnetic metal and alloy pigment
JPS5310100A (en) Method of manufacturing ferromagnetic metal powder
JPS5448622A (en) Carbonndeposited reduced iron powder and method of making same
JPS5499796A (en) Manufacture of metal and semimetal compound fine particle

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940926