GB1333174A - Ferrite particles for flexible permanent magnets - Google Patents

Ferrite particles for flexible permanent magnets

Info

Publication number
GB1333174A
GB1333174A GB3781371A GB3781371A GB1333174A GB 1333174 A GB1333174 A GB 1333174A GB 3781371 A GB3781371 A GB 3781371A GB 3781371 A GB3781371 A GB 3781371A GB 1333174 A GB1333174 A GB 1333174A
Authority
GB
United Kingdom
Prior art keywords
sheet
rolls
magnetic
repeatedly
aug
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
GB3781371A
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of GB1333174A publication Critical patent/GB1333174A/en
Expired 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
    • H01F1/10—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
    • H01F1/11—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
    • H01F1/113—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles in a bonding agent
    • H01F1/117—Flexible bodies
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2683—Other ferrites containing alkaline earth metals or lead
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • 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
    • H01F1/10—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
    • H01F1/11—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 non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/01—Magnetic additives

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Power Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Hard Magnetic Materials (AREA)
  • Laminated Bodies (AREA)
  • Soft Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)

Abstract

1333174 Laminates MINNESOTA MINING &MFGCO 11 Aug 1971 [12 Aug 1970] 37813/71 Heading B5N [Also in Division H1] A flexible laminated magnetic sheet is made by passing a synthetic rubber/magnetic powder mixture through coldrolls, and repeatedly doubling over the sheet and passing it through the rolls at gradually increasing roll spacings to form a 32 layer laminate. After 1 day, this laminate is repeatedly put through the rolls at gradually reduced spacing, and the resulting thinner sheet is again repeatedly doubled over and passed through the rolls at increasing spacing. The product is air cured at 150‹C. The magnetic composition comprises acidtreated barium ferrite (Division H1) in a butadiene-acrylonitrile binder. In a second embodiment, the binder is cis -1, 4-polyisoprene, and the laminated sheet is subjected to a magnetic field during curing.
GB3781371A 1970-08-12 1971-08-11 Ferrite particles for flexible permanent magnets Expired GB1333174A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US6329970A 1970-08-12 1970-08-12

Publications (1)

Publication Number Publication Date
GB1333174A true GB1333174A (en) 1973-10-10

Family

ID=22048288

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3781371A Expired GB1333174A (en) 1970-08-12 1971-08-11 Ferrite particles for flexible permanent magnets

Country Status (10)

Country Link
AT (1) AT314214B (en)
BE (1) BE771172A (en)
CA (1) CA978733A (en)
CH (1) CH568938A5 (en)
DE (1) DE2140319C3 (en)
ES (1) ES393853A1 (en)
FR (1) FR2104252A5 (en)
GB (1) GB1333174A (en)
NL (1) NL7110642A (en)
SE (1) SE362730B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5523549A (en) * 1994-05-25 1996-06-04 Ceramic Powders, Inc. Ferrite compositions for use in a microwave oven
WO2004072995A1 (en) 2003-02-14 2004-08-26 Dowa Mining Co., Ltd. Ferrite magnetic powder and method for production thereof

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN150524B (en) * 1978-02-09 1982-11-06 Aimants Ugimag Sa
FR2417168A1 (en) * 1979-02-06 1979-09-07 Aimants Ugimag Sa Strong permanent magnets made from ferrite powder - esp. flexible magnets, using inexpensive process to produce high energy prod.
US5002677A (en) * 1989-09-19 1991-03-26 The B. F. Goodrich Company Flexible high energy magnetic blend compositions based on ferrite particles in highly saturated nitrile rubber and methods of processing the same

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5523549A (en) * 1994-05-25 1996-06-04 Ceramic Powders, Inc. Ferrite compositions for use in a microwave oven
US5665819A (en) * 1994-05-25 1997-09-09 Ceramic Powders, Inc. Ferrite compositions for use in a microwave oven
WO2004072995A1 (en) 2003-02-14 2004-08-26 Dowa Mining Co., Ltd. Ferrite magnetic powder and method for production thereof
EP1594144A1 (en) * 2003-02-14 2005-11-09 Dowa Mining Co., Ltd. Ferrite magnetic powder and method for production thereof
EP1594144A4 (en) * 2003-02-14 2010-12-15 Dowa Electronics Materials Co Ferrite magnetic powder and method for production thereof

Also Published As

Publication number Publication date
NL7110642A (en) 1972-02-15
SE362730B (en) 1973-12-17
AU3218471A (en) 1973-02-15
CA978733A (en) 1975-12-02
DE2140319B2 (en) 1974-05-30
DE2140319C3 (en) 1975-02-13
AT314214B (en) 1974-03-25
BE771172A (en) 1972-02-11
DE2140319A1 (en) 1972-02-17
FR2104252A5 (en) 1972-04-14
CH568938A5 (en) 1975-11-14
ES393853A1 (en) 1973-08-16

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Legal Events

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