GB619779A - Improvements in iron powder and cores produced therefrom - Google Patents
Improvements in iron powder and cores produced therefromInfo
- Publication number
- GB619779A GB619779A GB29564/46A GB2956446A GB619779A GB 619779 A GB619779 A GB 619779A GB 29564/46 A GB29564/46 A GB 29564/46A GB 2956446 A GB2956446 A GB 2956446A GB 619779 A GB619779 A GB 619779A
- Authority
- GB
- United Kingdom
- Prior art keywords
- powder
- permeability
- specifications
- exceeding
- eddy current
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Soft Magnetic Materials (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Powder Metallurgy (AREA)
Abstract
Powdered iron of high permeability and low eddy current loss is manufactured by thermal decomposition of iron carbonyl producing spherical particles less than 12 microns in diameter, the powdered iron being reduced with a reducing gas at a temperature not exceeding 430 DEG C. and for a time which prevents sintering until the carbon content is reduced to a maximum of .029 per cent. The powder may be heated in hydrogen for 7-12 hours at 380-430 DEG C. and then lightly milled in a ball mill to break up any agglomeration of particles. The powder so obtained having an initial permeability of 40-72 may be mixed with a 2.5 per cent solution of a butareol soluble urea formaldehyde condensation product in n-butyl alcohol, the alcohol evaporated and the powder heated to set the resin. The grains obtained may then be moulded into cores having a permeability exceeding 50 and an eddy current loss coefficient of 0.6-7.0 x 10-7 ohms per henry and cycles per second squared. Specifications 269,677, 286,167, 306,215, [all in Class 72], and U.S.A. Specifications 1,783,560 and 1,783,561 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US619779XA | 1946-01-18 | 1946-01-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB619779A true GB619779A (en) | 1949-03-15 |
Family
ID=22039436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29564/46A Expired GB619779A (en) | 1946-01-18 | 1946-10-03 | Improvements in iron powder and cores produced therefrom |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB619779A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023034600A1 (en) * | 2021-09-03 | 2023-03-09 | 3D Glass Solutions, Inc. | Power amplifier system in a package |
| US11894594B2 (en) | 2017-12-15 | 2024-02-06 | 3D Glass Solutions, Inc. | Coupled transmission line resonate RF filter |
| US11908617B2 (en) | 2020-04-17 | 2024-02-20 | 3D Glass Solutions, Inc. | Broadband induction |
| US11929199B2 (en) | 2014-05-05 | 2024-03-12 | 3D Glass Solutions, Inc. | 2D and 3D inductors fabricating photoactive substrates |
| US11962057B2 (en) | 2019-04-05 | 2024-04-16 | 3D Glass Solutions, Inc. | Glass based empty substrate integrated waveguide devices |
-
1946
- 1946-10-03 GB GB29564/46A patent/GB619779A/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11929199B2 (en) | 2014-05-05 | 2024-03-12 | 3D Glass Solutions, Inc. | 2D and 3D inductors fabricating photoactive substrates |
| US11894594B2 (en) | 2017-12-15 | 2024-02-06 | 3D Glass Solutions, Inc. | Coupled transmission line resonate RF filter |
| US11962057B2 (en) | 2019-04-05 | 2024-04-16 | 3D Glass Solutions, Inc. | Glass based empty substrate integrated waveguide devices |
| US11908617B2 (en) | 2020-04-17 | 2024-02-20 | 3D Glass Solutions, Inc. | Broadband induction |
| WO2023034600A1 (en) * | 2021-09-03 | 2023-03-09 | 3D Glass Solutions, Inc. | Power amplifier system in a package |
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