GB736844A - Improvements in the manufacture of magnetic dust cores - Google Patents

Improvements in the manufacture of magnetic dust cores

Info

Publication number
GB736844A
GB736844A GB28984/53A GB2898453A GB736844A GB 736844 A GB736844 A GB 736844A GB 28984/53 A GB28984/53 A GB 28984/53A GB 2898453 A GB2898453 A GB 2898453A GB 736844 A GB736844 A GB 736844A
Authority
GB
United Kingdom
Prior art keywords
powder
magnetic dust
hour
mixture
air
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
GB28984/53A
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.)
T S SKILLMAN AND Co Pty L
Original Assignee
T S SKILLMAN AND Co Pty L
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 T S SKILLMAN AND Co Pty L filed Critical T S SKILLMAN AND Co Pty L
Publication of GB736844A publication Critical patent/GB736844A/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
    • H01F1/12—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 soft-magnetic materials
    • H01F1/14—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 soft-magnetic materials metals or alloys
    • H01F1/20—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 soft-magnetic materials metals or alloys in the form of particles, e.g. powder
    • H01F1/22—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 soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
    • H01F1/24—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 soft-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together the particles being insulated

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Soft Magnetic Materials (AREA)

Abstract

736,844. Magnetic dust structures. SKILLMAN & CO., PTY., Ltd., T. S. Oct. 20, 1953 [Nov. 7, 1952], No. 28984/53. Class 38 (2). A magnetic dust core is made by depositing between the particles of a magnetic alloy powder containing iron and nickel, colloidal silica derived by hydrolysis of a silicon ester. A mixture of strong aqueous ammonia and ethyl alcohol is stirred into the metal powder, a mixture of "condensed" ethyl silicate and ethyl alcohol then being added. The mix is warmed to dryness, stirring being continued throughout. The dried powder is heated at 900‹ for one hour in nickel crucibles in air-tight iron pots. The process may be repeated with the resultant powder whereby more silica is deposited. The final powder may be compressed to shape and annealed at 600‹ C. for one hour in an air-tight metal pipe with an inner copper sleeve. The cores may be skimmed in a lathe and soaked in lacquer.
GB28984/53A 1952-11-07 1953-10-20 Improvements in the manufacture of magnetic dust cores Expired GB736844A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU736844X 1952-11-07

Publications (1)

Publication Number Publication Date
GB736844A true GB736844A (en) 1955-09-14

Family

ID=3755858

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28984/53A Expired GB736844A (en) 1952-11-07 1953-10-20 Improvements in the manufacture of magnetic dust cores

Country Status (1)

Country Link
GB (1) GB736844A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0177276A2 (en) * 1984-09-29 1986-04-09 Kabushiki Kaisha Toshiba Compressed magnetic powder core
CN114082943A (en) * 2021-11-23 2022-02-25 成都佳驰电子科技股份有限公司 Method for coating carbonyl iron powder with silicon dioxide in ethanol-free system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0177276A2 (en) * 1984-09-29 1986-04-09 Kabushiki Kaisha Toshiba Compressed magnetic powder core
EP0177276A3 (en) * 1984-09-29 1987-09-23 Kabushiki Kaisha Toshiba Compressed magnetic powder core
EP0434669A2 (en) * 1984-09-29 1991-06-26 Kabushiki Kaisha Toshiba Method of making a coated magnetic powder and a compressed magnetic powder core
EP0434669A3 (en) * 1984-09-29 1991-07-24 Kabushiki Kaisha Toshiba Method of making a coated magnetic powder and a compressed magnetic powder core
CN114082943A (en) * 2021-11-23 2022-02-25 成都佳驰电子科技股份有限公司 Method for coating carbonyl iron powder with silicon dioxide in ethanol-free system
CN114082943B (en) * 2021-11-23 2024-01-05 成都佳驰电子科技股份有限公司 Method for coating carbonyl iron powder with silicon dioxide in ethanol-free system

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