EP0389511A1 - SINTERED Fe-Nd-B MAGNET - Google Patents
SINTERED Fe-Nd-B MAGNETInfo
- Publication number
- EP0389511A1 EP0389511A1 EP19880909531 EP88909531A EP0389511A1 EP 0389511 A1 EP0389511 A1 EP 0389511A1 EP 19880909531 EP19880909531 EP 19880909531 EP 88909531 A EP88909531 A EP 88909531A EP 0389511 A1 EP0389511 A1 EP 0389511A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- weight
- oxygen
- added
- oxide
- magnet
- 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.)
- Withdrawn
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
- H01F1/032—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
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0577—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together sintered
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
- C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
- C22C32/0026—Matrix based on Ni, Co, Cr or alloys thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Power Engineering (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
Abstract
Un aimant fritté à base de Fe-Nd-B ayant une intensité améliorée de champ coercitif, moins dépendante de la température, se compose d'entre 25 % et 50 % en poids de Nd, d'entre 0,5 et 2 % en poids de B, d'entre 0 % et 5 % en poids d'Al, d'entre 0,5 % et 3 % en poids d'O, le solde étant composé de Fe et des impuretés habituelles. L'aimant présente une teneur en oxygène ajustée, avant le frittage à densité maximale, par adjonction d'oxygène ou de composés contenant de l'oxygène, notamment un oxyde d'Al et/ou de N. On réalise l'aimant en faisant fondre les constituants à l'état pur, de façon à former un premier alliage, puis en pulvérisant l'alliage, en alignant la poudre ainsi obtenue dans un champ magnétique et en la comprimant de façon à former un compact vert que l'on fritte à une température comprise entre 1040° et 1100° C et que l'on fait finalement revenir à une température comprise entre 600° et 700°C, l'oxygène étant ajouté sous forme d'oxyde Al ou de Nd à l'atmosphère de pulvérisation et/ou de frittage.A Fe-Nd-B based sintered magnet with improved coercive field strength, less dependent on temperature, consists of between 25% and 50% by weight of Nd, between 0.5 and 2% by weight. weight of B, between 0% and 5% by weight of Al, between 0.5% and 3% by weight of O, the balance being composed of Fe and the usual impurities. The magnet has an adjusted oxygen content, before sintering at maximum density, by adding oxygen or compounds containing oxygen, in particular an oxide of Al and / or N. The magnet is produced by making melting the constituents in the pure state, so as to form a first alloy, then by pulverizing the alloy, by aligning the powder thus obtained in a magnetic field and by compressing it so as to form a green compact which is sintered at a temperature between 1040 ° and 1100 ° C and which is finally brought back to a temperature between 600 ° and 700 ° C, the oxygen being added in the form of Al oxide or Nd to the atmosphere of spraying and / or sintering.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873740157 DE3740157A1 (en) | 1987-11-26 | 1987-11-26 | SINTER MAGNET BASED ON FE-ND-B |
DE3740157 | 1987-11-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0389511A1 true EP0389511A1 (en) | 1990-10-03 |
Family
ID=6341366
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19880909531 Withdrawn EP0389511A1 (en) | 1987-11-26 | 1988-10-28 | SINTERED Fe-Nd-B MAGNET |
Country Status (5)
Country | Link |
---|---|
US (1) | US5194099A (en) |
EP (1) | EP0389511A1 (en) |
JP (1) | JPH03501189A (en) |
DE (1) | DE3740157A1 (en) |
WO (1) | WO1989005031A1 (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0389626B1 (en) * | 1988-06-03 | 1996-11-13 | Mitsubishi Materials Corporation | SINTERED RARE EARTH ELEMENT-B-Fe-MAGNET AND PROCESS FOR ITS PRODUCTION |
US5478411A (en) * | 1990-12-21 | 1995-12-26 | Provost, Fellows And Scholars Of The College Of The Holy And Undivided Trinity Of Queen Elizabeth Near Dublin | Magnetic materials and processes for their production |
JPH11307327A (en) * | 1998-04-22 | 1999-11-05 | Sanei Kasei Kk | Composition for permanent magnet |
JP2001123201A (en) | 1999-08-17 | 2001-05-08 | Sanei Kasei Kk | Method for producing sinetred permanent magnet |
DE19945942C2 (en) * | 1999-09-24 | 2003-07-17 | Vacuumschmelze Gmbh | Process for the production of permanent magnets from a low-boron Nd-Fe-B alloy |
DE60131699T2 (en) * | 2000-06-13 | 2008-11-20 | Shin-Etsu Chemical Co., Ltd. | Permanent magnet materials based on R-Fe-B |
US6648984B2 (en) * | 2000-09-28 | 2003-11-18 | Sumitomo Special Metals Co., Ltd. | Rare earth magnet and method for manufacturing the same |
JP5437544B2 (en) * | 2001-06-11 | 2014-03-12 | 株式会社三徳 | Manufacturing method of negative electrode for secondary battery |
US20050062572A1 (en) * | 2003-09-22 | 2005-03-24 | General Electric Company | Permanent magnet alloy for medical imaging system and method of making |
US8211327B2 (en) * | 2004-10-19 | 2012-07-03 | Shin-Etsu Chemical Co., Ltd. | Preparation of rare earth permanent magnet material |
TWI417906B (en) * | 2005-03-23 | 2013-12-01 | Shinetsu Chemical Co | Functionally graded rare earth permanent magnet |
MY142024A (en) * | 2005-03-23 | 2010-08-16 | Shinetsu Chemical Co | Rare earth permanent magnet |
TWI413136B (en) * | 2005-03-23 | 2013-10-21 | Shinetsu Chemical Co | Rare earth permanent magnet |
MY141999A (en) | 2005-03-23 | 2010-08-16 | Shinetsu Chemical Co | Functionally graded rare earth permanent magnet |
US7955443B2 (en) * | 2006-04-14 | 2011-06-07 | Shin-Etsu Chemical Co., Ltd. | Method for preparing rare earth permanent magnet material |
JP4656323B2 (en) * | 2006-04-14 | 2011-03-23 | 信越化学工業株式会社 | Method for producing rare earth permanent magnet material |
JP4840606B2 (en) | 2006-11-17 | 2011-12-21 | 信越化学工業株式会社 | Rare earth permanent magnet manufacturing method |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1316375C (en) * | 1982-08-21 | 1993-04-20 | Masato Sagawa | Magnetic materials and permanent magnets |
US4601875A (en) * | 1983-05-25 | 1986-07-22 | Sumitomo Special Metals Co., Ltd. | Process for producing magnetic materials |
DE3575231D1 (en) * | 1984-02-28 | 1990-02-08 | Sumitomo Spec Metals | METHOD FOR PRODUCING PERMANENT MAGNETS. |
JPS61245505A (en) * | 1985-04-23 | 1986-10-31 | Seiko Instr & Electronics Ltd | Manufacture of rare-earth iron magnet |
JPH0685369B2 (en) * | 1985-05-17 | 1994-10-26 | 日立金属株式会社 | Permanent magnet manufacturing method |
US4588439A (en) * | 1985-05-20 | 1986-05-13 | Crucible Materials Corporation | Oxygen containing permanent magnet alloy |
US4762574A (en) * | 1985-06-14 | 1988-08-09 | Union Oil Company Of California | Rare earth-iron-boron premanent magnets |
JPS62134907A (en) * | 1985-12-09 | 1987-06-18 | Hitachi Metals Ltd | R-b-fe system sintered magnet and manufacture thereof |
US4954186A (en) * | 1986-05-30 | 1990-09-04 | Union Oil Company Of California | Rear earth-iron-boron permanent magnets containing aluminum |
CN1051865C (en) * | 1986-08-04 | 2000-04-26 | 住友特殊金属株式会社 | Rare earih magnet having excellent corrosion resistance |
DE3637521A1 (en) * | 1986-11-04 | 1988-05-11 | Schramberg Magnetfab | Permanent magnet and process for producing it |
US4834812A (en) * | 1987-11-02 | 1989-05-30 | Union Oil Company Of California | Method for producing polymer-bonded magnets from rare earth-iron-boron compositions |
JPH06260207A (en) * | 1993-03-02 | 1994-09-16 | Fuji Electric Co Ltd | Stack of phosphate type fuel cell |
-
1987
- 1987-11-26 DE DE19873740157 patent/DE3740157A1/en not_active Withdrawn
-
1988
- 1988-10-28 EP EP19880909531 patent/EP0389511A1/en not_active Withdrawn
- 1988-10-28 WO PCT/EP1988/000978 patent/WO1989005031A1/en not_active Application Discontinuation
- 1988-10-28 JP JP63508799A patent/JPH03501189A/en active Pending
- 1988-10-28 US US07/466,457 patent/US5194099A/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO8905031A1 * |
Also Published As
Publication number | Publication date |
---|---|
US5194099A (en) | 1993-03-16 |
DE3740157A1 (en) | 1989-06-08 |
WO1989005031A1 (en) | 1989-06-01 |
JPH03501189A (en) | 1991-03-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19900523 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: ROBERT BOSCH GMBH Owner name: MAX-PLANCK-GESELLSCHAFT ZUR FOERDERUNG DER WISSENS |
|
17Q | First examination report despatched |
Effective date: 19920615 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19921207 |