GB1362720A - Flexible permanent magnet - Google Patents

Flexible permanent magnet

Info

Publication number
GB1362720A
GB1362720A GB4791171A GB4791171A GB1362720A GB 1362720 A GB1362720 A GB 1362720A GB 4791171 A GB4791171 A GB 4791171A GB 4791171 A GB4791171 A GB 4791171A GB 1362720 A GB1362720 A GB 1362720A
Authority
GB
United Kingdom
Prior art keywords
ferrite
ferrite particles
flexible
baco3
fe2o3
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
GB4791171A
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.)
Cochardt H G
Original Assignee
Cochardt H G
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 Cochardt H G filed Critical Cochardt H G
Publication of GB1362720A publication Critical patent/GB1362720A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F13/00—Apparatus or processes for magnetising or demagnetising
    • H01F13/003—Methods and devices for magnetising permanent magnets
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Hard Magnetic Materials (AREA)
  • Compounds Of Iron (AREA)
  • Magnetic Ceramics (AREA)

Abstract

1362720 Flexible ferrite magnets H G COCHARDT 14 Oct 1971 [14 Oct 1970] 47911/71 Heading C1J [Also in Division C3] Flexible permanent magnets contain ferrite particles embedded in an elastomeric binder, the ferrite particles having predominantly single crystal characteristics and at least a proportion of the ferrite particles being of multi-domain size. Powdered iron ore is the basic raw material from which such ferrites are made, typical starting mixes comprising 19% BaCO3, 80% Fe2O3 and 1% of SiO2, sulphates, CaO and/or Al2O3. Additionally the ferrites may contain Sr, Pb or Ca. An example describes the manufacture of a ferrite from 800 g. Fe2O3, 180 g. of BaCO3 and 20 g. of PbO.SiO2 which was calcined at 2150‹ F., pulverized, milled in water and pressed.
GB4791171A 1970-10-14 1971-10-14 Flexible permanent magnet Expired GB1362720A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US8058070A 1970-10-14 1970-10-14

Publications (1)

Publication Number Publication Date
GB1362720A true GB1362720A (en) 1974-08-07

Family

ID=22158285

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4791171A Expired GB1362720A (en) 1970-10-14 1971-10-14 Flexible permanent magnet

Country Status (5)

Country Link
US (1) US3764539A (en)
DE (1) DE2149698A1 (en)
FR (1) FR2111308A5 (en)
GB (1) GB1362720A (en)
IT (1) IT939984B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2134128A (en) * 1983-01-27 1984-08-08 Oilfield Inspection Services Magnetically conductive materials and articles and methods using them
GB2153367A (en) * 1984-01-30 1985-08-21 Picker Int Ltd Flexible shim for n.m.r. apparatus

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4028255A (en) * 1973-01-31 1977-06-07 Ici Australia Limited Preparation of polymer composites
US3897355A (en) * 1973-04-26 1975-07-29 Gen Electric Method of making permanent ferrite magnets
US4042516A (en) * 1974-03-01 1977-08-16 Sakai Chemical Industry Co., Ltd. Bonded magnets containing single crystalline ferrite particles
DE2652698A1 (en) * 1975-12-02 1977-06-08 Kuraray Co PERMANENT MAGNETIC COMPOSITE
US4067810A (en) * 1976-02-09 1978-01-10 Ofco, Inc. Fluid filter magnet assembly
US4120806A (en) * 1976-08-30 1978-10-17 Dowa Mining Co., Ltd. Hexagonal-system ferrite powder, composite plastic-ferrite magnet comprising same and process for production thereof
JPS5364797A (en) * 1976-11-24 1978-06-09 Tdk Corp Rubber, plastic magnet and magnetic powder for them
EP0080160B1 (en) * 1981-11-20 1986-01-22 The B.F. GOODRICH Company Permanent magnets
NO155316C (en) * 1982-04-23 1987-03-11 Sintef PROCEDURE FOR MAKING MAGNETIC POLYMER PARTICLES.
WO1984002031A1 (en) * 1982-11-10 1984-05-24 Sintef Magnetic polymer particles and process for the preparation thereof
DE3305816A1 (en) * 1983-02-19 1984-08-23 Thomas J. Arlington Va. Greer jun. Articulated doll with moving face
US4824587A (en) * 1985-03-18 1989-04-25 The Dow Chemical Company Composites of coercive particles and superparamagnetic particles
EP0310223A1 (en) * 1987-07-27 1989-04-05 Maghemite Inc. Magnet composition
US4881988A (en) * 1987-11-16 1989-11-21 Rjf International Corporation Novel flexible magnet for use in small dc motors
US5055155A (en) * 1989-10-12 1991-10-08 Texstyle, Inc. Method and apparatus for laminating flexible magnetic strips onto flexible plastic substrates
WO1995001736A1 (en) * 1993-07-06 1995-01-19 Utecht Leo J Personal protection apparatus
EP1053552B1 (en) * 1998-02-09 2003-02-05 Lofo High Tech Film GmbH Method for the production of a magnetic film
IT1306822B1 (en) * 1998-11-09 2001-10-02 Paolo Giovannini CALZONCINO FOR THE TOPICAL TREATMENT OF CELLULITE.
US7326170B1 (en) 1999-06-18 2008-02-05 Miller Wendell E Method and apparatus for restoring or enhancing an ambient magnetic field
US6416458B1 (en) 2000-07-12 2002-07-09 Therion Research Inc. Therapeutic flexible magnetic sheet and method
US6790378B2 (en) 2001-10-05 2004-09-14 R. William Graham Coating composition having magnetic properties
WO2008091297A2 (en) * 2006-08-11 2008-07-31 Northeastern University Method of manufacturing thick-film, low microwave loss, self-biased barium-hexaferrite having perpendicular magnetic anisotropy
CN101777818A (en) * 2009-01-09 2010-07-14 德昌电机(深圳)有限公司 Permanent magnet motor
KR101620307B1 (en) * 2009-07-28 2016-05-13 삼성전자주식회사 Y-type hexagonal ferrite, antenna apparatus therewith, and method for manufacturing the same
EP2632809B1 (en) 2010-10-27 2015-11-18 Intercontinental Great Brands LLC Magnetically closable product accommodating package
US11654349B2 (en) * 2019-04-24 2023-05-23 Scale Up The Fun, Llc Hobby projectile
CN114538910B (en) * 2020-11-26 2023-03-07 和也健康科技有限公司 Magnetic stripe for intelligent healthy home and preparation method thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA717462A (en) * 1965-09-07 W. Mabbott Jean Flexible permanent magnets
GB860220A (en) * 1958-07-15 1961-02-01 Leyman Corp Mechanical orientation of magnetically anisotropic particles
US3115469A (en) * 1959-06-22 1963-12-24 Monsanto Chemicals Production of single crystals of ferrites
NL296037A (en) * 1962-08-01
US3379643A (en) * 1964-11-27 1968-04-23 Allied Chem Flexible magnetic plastic composition
US3597357A (en) * 1968-03-19 1971-08-03 Westinghouse Electric Corp Method of making strontium-ferrite magnets and the products so produced

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2134128A (en) * 1983-01-27 1984-08-08 Oilfield Inspection Services Magnetically conductive materials and articles and methods using them
GB2153367A (en) * 1984-01-30 1985-08-21 Picker Int Ltd Flexible shim for n.m.r. apparatus
US4631481A (en) * 1984-01-30 1986-12-23 Picker International Limited N.M.R. shims

Also Published As

Publication number Publication date
FR2111308A5 (en) 1972-06-02
IT939984B (en) 1973-02-10
US3764539A (en) 1973-10-09
DE2149698A1 (en) 1972-04-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee