GB736844A - Improvements in the manufacture of magnetic dust cores - Google Patents
Improvements in the manufacture of magnetic dust coresInfo
- 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
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.
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)
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 |
-
1953
- 1953-10-20 GB GB28984/53A patent/GB736844A/en not_active Expired
Cited By (6)
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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