GB1029728A - Improvements relating to methods of manufacturing manganese-bismuth magnet bodies - Google Patents

Improvements relating to methods of manufacturing manganese-bismuth magnet bodies

Info

Publication number
GB1029728A
GB1029728A GB4830064A GB4830064A GB1029728A GB 1029728 A GB1029728 A GB 1029728A GB 4830064 A GB4830064 A GB 4830064A GB 4830064 A GB4830064 A GB 4830064A GB 1029728 A GB1029728 A GB 1029728A
Authority
GB
United Kingdom
Prior art keywords
aqueous solution
methods
improvements relating
magnet bodies
polished
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
GB4830064A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1029728A publication Critical patent/GB1029728A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/34—Pretreatment of metallic surfaces to be electroplated
    • C25D5/38—Pretreatment of metallic surfaces to be electroplated of refractory metals or nickel
    • 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
    • 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
    • H01F1/08—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 pressed, sintered, or bound together

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemically Coating (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Lubricants (AREA)

Abstract

A Mn-Bi magnet formed by compacting Mn-Bi powder, is polished in a rotating drum with polishing elements e.g. steel, ceramic and carborundum in an anhydrous medium such as petrol or kerosene and then coated with a metal layer such as Cu or Ni at least 25 microns thick from an aqueous solution of the metal salt either electrolytically or by chemical reduction. Before coating the polished compact may be dipped in a dilute HCl solution. For electrolytic deposition of Ni the aqueous solution may contain 300 g/l of nickel sulphamate, 30 g/l nickel chloride, 30 g/l boric acid and have a pH of 4.5-5. For the chemical deposition of Cu the aqueous solution contains 110 g/l copper pyrophosphate, 380 g/l potassium pyrophosphate, 25 g/l potassium citrate and 10 mls/l ammonia and have a pH of 8.2.
GB4830064A 1963-12-02 1964-11-27 Improvements relating to methods of manufacturing manganese-bismuth magnet bodies Expired GB1029728A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL301246 1963-12-02

Publications (1)

Publication Number Publication Date
GB1029728A true GB1029728A (en) 1966-05-18

Family

ID=19755259

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4830064A Expired GB1029728A (en) 1963-12-02 1964-11-27 Improvements relating to methods of manufacturing manganese-bismuth magnet bodies

Country Status (6)

Country Link
AT (1) AT253791B (en)
BE (1) BE656470A (en)
CH (1) CH449796A (en)
DE (1) DE1521410A1 (en)
GB (1) GB1029728A (en)
NL (1) NL301246A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100336940C (en) * 2005-02-24 2007-09-12 上海交通大学 Composite electroforming preparing process for nano silicon carbide particle reinforced nickel base composite material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100336940C (en) * 2005-02-24 2007-09-12 上海交通大学 Composite electroforming preparing process for nano silicon carbide particle reinforced nickel base composite material

Also Published As

Publication number Publication date
DE1521410A1 (en) 1969-10-09
AT253791B (en) 1967-04-25
CH449796A (en) 1968-01-15
BE656470A (en)
NL301246A (en)

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