GB2001949A - Producing permanent magnets - Google Patents
Producing permanent magnetsInfo
- Publication number
- GB2001949A GB2001949A GB7831099A GB7831099A GB2001949A GB 2001949 A GB2001949 A GB 2001949A GB 7831099 A GB7831099 A GB 7831099A GB 7831099 A GB7831099 A GB 7831099A GB 2001949 A GB2001949 A GB 2001949A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxygen
- partial pressure
- complying
- permanent magnets
- sintered
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
- C04B35/2683—Other ferrites containing alkaline earth metals or lead
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
In a process for producing a permanent magnet from a powdered mixture of iron oxide or compounds forming iron oxide and one or more oxides or oxide forming compounds of Ba, Sr and Pb the mixture is sintered in an oxygen-containing atmosphere in which the partial pressure of oxygen is maintained at a value complying with a prescribed law, the resulting product ground and pressed into a shaped body under the action of a magnetic field and again sintered with the partial pressure of oxygen complying with the same law. The iron may be partially replaced by one or more of Zn, Cu, Ni, Co, Mn and Mg. The final magnet may also contain oxides of Al, Ga, Cr, Si and Ti.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19772733557 DE2733557A1 (en) | 1977-07-26 | 1977-07-26 | PROCESS FOR MANUFACTURING ANISOTROPIC, OXIDIC PERMANENT MAGNET |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2001949A true GB2001949A (en) | 1979-02-14 |
| GB2001949B GB2001949B (en) | 1982-02-10 |
Family
ID=6014808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7831099A Expired GB2001949B (en) | 1977-07-26 | 1978-07-25 | Process for the production of an anisotropic oxidic permanent magnet |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE2733557A1 (en) |
| FR (1) | FR2399106A1 (en) |
| GB (1) | GB2001949B (en) |
| NL (1) | NL7807537A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997035815A1 (en) * | 1996-03-26 | 1997-10-02 | Sumitomo Special Metals Co., Ltd. | Ferrite magnet, and powder for ferrite magnet and production process thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8002990A (en) | 1980-05-23 | 1981-12-16 | Philips Nv | METHOD FOR MANUFACTURING AN ANISOTROPIC PERMANENT OXIDE BASED MAGNET |
-
1977
- 1977-07-26 DE DE19772733557 patent/DE2733557A1/en not_active Withdrawn
-
1978
- 1978-07-13 NL NL7807537A patent/NL7807537A/en not_active Application Discontinuation
- 1978-07-20 FR FR7821471A patent/FR2399106A1/en active Granted
- 1978-07-25 GB GB7831099A patent/GB2001949B/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997035815A1 (en) * | 1996-03-26 | 1997-10-02 | Sumitomo Special Metals Co., Ltd. | Ferrite magnet, and powder for ferrite magnet and production process thereof |
| US5866028A (en) * | 1996-03-26 | 1999-02-02 | Sumitomo Special Metals, Co., Ltd. | Ferrite magnet, and powder for ferrite magnet and production process thereof |
| CN1082496C (en) * | 1996-03-26 | 2002-04-10 | 住友特殊金属株式会社 | Ferrite magnet, and powder for ferrite magnet and prodn. process |
Also Published As
| Publication number | Publication date |
|---|---|
| NL7807537A (en) | 1979-01-30 |
| DE2733557A1 (en) | 1979-02-01 |
| FR2399106B3 (en) | 1981-04-17 |
| FR2399106A1 (en) | 1979-02-23 |
| GB2001949B (en) | 1982-02-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5565406A (en) | Ferrite powder for magnetic toner for use in electronic photograph and its preparation | |
| JPS5691912A (en) | Mandrel for piercing mill | |
| GB1273419A (en) | Process for producing ceramic materials | |
| JPS53113754A (en) | Preparation of ferromagnetic powder | |
| ES383757A1 (en) | Method of manufacturing a body having anisotropic, permanent magneticproperties | |
| JPS5638402A (en) | High density sintered magnetic body and its manufacture | |
| GB2001949A (en) | Producing permanent magnets | |
| GB1496890A (en) | Manufacture of magnetic materials which exhibit exchange anisotropy | |
| GB823971A (en) | Improvements in or relating to ferromagnetic ferrite materials | |
| GB842005A (en) | Improvements in or relating to ferromagnetic materials | |
| GB1457709A (en) | Magnetically semi-hard cobalt-nickel-iron based alloys | |
| JPS55164048A (en) | Production of intermetallic compound ferromagnetic body | |
| JPS5591803A (en) | Permanent magnet | |
| JPS5739102A (en) | Production of permanent magnet | |
| JPS5379798A (en) | Production of fine powder of transition metal oxide or oxyhydroxide | |
| JPS5375497A (en) | Fabrication of magnetic material | |
| JPS5221203A (en) | Carbon-contained iron-base sintered alloy | |
| GB789099A (en) | Improvements in or relating to a method of producing magnetic cores | |
| GB1070510A (en) | Ferromagnetic materials and processes for their manufacture | |
| JPS6473602A (en) | Manufacture of permanent magnet | |
| JPS5651558A (en) | Fe-cr-co permanent magnet material | |
| JPS5366808A (en) | Preparation of pure iron and ferrous sintered material | |
| JPS53124799A (en) | Magnetic sealed material | |
| JPS5651557A (en) | Fe-cr-co permanent magnet material | |
| JPS5450409A (en) | Sintered steel of high density and its preparation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |