GB1378195A - Permanent magnet materials - Google Patents
Permanent magnet materialsInfo
- Publication number
- GB1378195A GB1378195A GB2553772A GB2553772A GB1378195A GB 1378195 A GB1378195 A GB 1378195A GB 2553772 A GB2553772 A GB 2553772A GB 2553772 A GB2553772 A GB 2553772A GB 1378195 A GB1378195 A GB 1378195A
- Authority
- GB
- United Kingdom
- Prior art keywords
- permanent magnet
- particles
- component
- mixture
- magnetization component
- 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
- 239000002245 particle Substances 0.000 abstract 3
- 238000005056 compaction Methods 0.000 abstract 2
- 230000005415 magnetization Effects 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- 229910000859 α-Fe Inorganic materials 0.000 abstract 2
- 229910001122 Mischmetal Inorganic materials 0.000 abstract 1
- 229910045601 alloy Chemical group 0.000 abstract 1
- 239000000956 alloy Chemical group 0.000 abstract 1
- 239000011230 binding agent Substances 0.000 abstract 1
- 239000003822 epoxy resin Substances 0.000 abstract 1
- 230000005294 ferromagnetic effect Effects 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 238000007731 hot pressing Methods 0.000 abstract 1
- 230000005291 magnetic effect Effects 0.000 abstract 1
- 239000004033 plastic Substances 0.000 abstract 1
- 229920000647 polyepoxide Polymers 0.000 abstract 1
- 229910052761 rare earth metal Inorganic materials 0.000 abstract 1
- 150000002910 rare earth metals Chemical group 0.000 abstract 1
- 239000005060 rubber Substances 0.000 abstract 1
- 239000001993 wax Substances 0.000 abstract 1
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
- H01F1/04—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
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/0555—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
- H01F1/0557—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together sintered
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Hard Magnetic Materials (AREA)
Abstract
1378195 Ferrite magnets DEFENCE SECRETARY OF STATE FOR 8 June 1973 [31 May 1972] 25537/72 Heading C1J [Also in Division H1] A permanent magnet is compacted of a pressure sintered mixture of a particulate high coercivity component and a particulate high magnetization component of particle size less than 10 microns. The high coercivity particles may be RCO 5 wherein R is a rare earth or an alloy of the same; preferentially Sm, PrSm, LaSm, CeSm, CuCe or Cu-Mischmetall; or alternatively ferromagnetic oxides, e.g. Ba and Sr ferrites; while the high magnetization component may be powdered Fe. The mixture may alternatively contain a binder, e.g. glass, epoxy resin, plastic, wax or rubber, and after hot press compaction may be poled in a strong magnetic field. The particles may be magnetically oriented before compaction, and the hot pressing may be effected in an inert atmosphere, e.g. He
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2553772A GB1378195A (en) | 1973-06-08 | 1973-06-08 | Permanent magnet materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2553772A GB1378195A (en) | 1973-06-08 | 1973-06-08 | Permanent magnet materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1378195A true GB1378195A (en) | 1974-12-27 |
Family
ID=10229279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2553772A Expired GB1378195A (en) | 1973-06-08 | 1973-06-08 | Permanent magnet materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1378195A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4131495A (en) * | 1975-12-02 | 1978-12-26 | Bbc Brown, Boveri & Company, Limited | Permanent-magnet alloy |
| US4192696A (en) * | 1975-12-02 | 1980-03-11 | Bbc Brown Boveri & Company Limited | Permanent-magnet alloy |
-
1973
- 1973-06-08 GB GB2553772A patent/GB1378195A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4131495A (en) * | 1975-12-02 | 1978-12-26 | Bbc Brown, Boveri & Company, Limited | Permanent-magnet alloy |
| US4192696A (en) * | 1975-12-02 | 1980-03-11 | Bbc Brown Boveri & Company Limited | Permanent-magnet alloy |
| US4322257A (en) * | 1975-12-02 | 1982-03-30 | Bbc, Brown, Boveri & Company, Limited | Permanent-magnet alloy |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLE | Entries relating assignments, transmissions, licences in the register of patents | ||
| PCNP | Patent ceased through non-payment of renewal fee |