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GB1019931A - Improvements in or relating to methods of manufacturing permanent magnets - Google Patents

Improvements in or relating to methods of manufacturing permanent magnets

Info

Publication number
GB1019931A
GB1019931A GB4010362A GB4010362A GB1019931A GB 1019931 A GB1019931 A GB 1019931A GB 4010362 A GB4010362 A GB 4010362A GB 4010362 A GB4010362 A GB 4010362A GB 1019931 A GB1019931 A GB 1019931A
Authority
GB
United Kingdom
Prior art keywords
particles
range
alloy
lixiviating
cobalt
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
GB4010362A
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 GB1019931A publication Critical patent/GB1019931A/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
    • 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
    • H01F1/10—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Hard Magnetic Materials (AREA)

Abstract

Particulate (Fe,Co)2P alloy in which the ratio Fe:Co lies within the range 90:10 to 70:30 by weight is caused to have a hexagonal crystal structure by cooling from a temperature in the range 900-1150 DEG C. to below 600 DEG C. at a rate not less than the minimum shown by Fig. 3 for the appropriate composition. The <PICT:1019931/C6-C7/1> magnetic properties may be improved by subsequently treating the alloy at 300-650 DEG C. in a non-oxidizing atmosphere; this treatment may be repeated after the particles have been formed into a permanent magnet by composition in a magnetic field. The particles may be prepared by melting together phosphoruscopper, iron and cobalt in appropriate proportions, casting under such conditions that the stipulated minimum cooling rate is attained, and lixiviating the product with dilute nitric acid at 80 DEG C.ALSO:Particles of (Fe, Co)2 P in which the ratio Fe: Co lies within the range 90: 10 to 70: 30 by weight are produced by melting together phosphorus-copper, iron and cobalt in suitable proportions, casting the resultant alloy and lixiviating with dilute nitric acid to remove copper.
GB4010362A 1961-10-26 1962-10-23 Improvements in or relating to methods of manufacturing permanent magnets Expired GB1019931A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL270683 1961-10-26

Publications (1)

Publication Number Publication Date
GB1019931A true GB1019931A (en) 1966-02-09

Family

ID=19753365

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4010362A Expired GB1019931A (en) 1961-10-26 1962-10-23 Improvements in or relating to methods of manufacturing permanent magnets

Country Status (4)

Country Link
AT (1) AT241135B (en)
DE (1) DE1263803B (en)
ES (1) ES281840A1 (en)
GB (1) GB1019931A (en)

Also Published As

Publication number Publication date
AT241135B (en) 1965-07-12
DE1263803B (en) 1968-03-21
ES281840A1 (en) 1963-06-16

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