ES393853A1 - Ferrite particles for flexible permanent magnets - Google Patents

Ferrite particles for flexible permanent magnets

Info

Publication number
ES393853A1
ES393853A1 ES393853A ES393853A ES393853A1 ES 393853 A1 ES393853 A1 ES 393853A1 ES 393853 A ES393853 A ES 393853A ES 393853 A ES393853 A ES 393853A ES 393853 A1 ES393853 A1 ES 393853A1
Authority
ES
Spain
Prior art keywords
ferrite particles
ferrite
particles
procedure
weight percent
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
ES393853A
Other languages
Spanish (es)
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 ES393853A1 publication Critical patent/ES393853A1/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

Procedure for making barium ferrite particles, in which large surface area acicular Fe2O3 alpha particles and BaCO3 react with each other forming a ferrite of the generalized formula BaFe12O19, followed by treatment of the ferrite with an acidic aqueous solution to remove undesirable reaction products and any unreacted materials, which procedure is characterized in that the reaction takes place at a temperature of 850º-1100ºC in the presence of 3/4 to 1-3/4 weight percent of a lead compound, more than 1 to 6 weight percent flux, to provide barium ferrite particles that are specially prepared for machining orientation in admixture with a workable, non-magnetic matrix material. (Machine-translation by Google Translate, not legally binding)
ES393853A 1970-08-12 1971-08-02 Ferrite particles for flexible permanent magnets Expired ES393853A1 (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
ES393853A1 true ES393853A1 (en) 1973-08-16

Family

ID=22048288

Family Applications (1)

Application Number Title Priority Date Filing Date
ES393853A Expired ES393853A1 (en) 1970-08-12 1971-08-02 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)

Families Citing this family (5)

* 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
US5523549A (en) * 1994-05-25 1996-06-04 Ceramic Powders, Inc. Ferrite compositions for use in a microwave oven
JP4555953B2 (en) * 2003-02-14 2010-10-06 Ｄｏｗａエレクトロニクス株式会社 Ferrite magnetic powder manufacturing method

Also Published As

Publication number Publication date
NL7110642A (en) 1972-02-15
AT314214B (en) 1974-03-25
FR2104252A5 (en) 1972-04-14
DE2140319A1 (en) 1972-02-17
SE362730B (en) 1973-12-17
CA978733A (en) 1975-12-02
CH568938A5 (en) 1975-11-14
DE2140319C3 (en) 1975-02-13
AU3218471A (en) 1973-02-15
GB1333174A (en) 1973-10-10
BE771172A (en) 1972-02-11
DE2140319B2 (en) 1974-05-30

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