CN1212625C - 稀土磁体用烧结压制体的制备方法 - Google Patents
稀土磁体用烧结压制体的制备方法 Download PDFInfo
- Publication number
- CN1212625C CN1212625C CNB02800504XA CN02800504A CN1212625C CN 1212625 C CN1212625 C CN 1212625C CN B02800504X A CNB02800504X A CN B02800504XA CN 02800504 A CN02800504 A CN 02800504A CN 1212625 C CN1212625 C CN 1212625C
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- Prior art keywords
- fine powder
- rare earth
- powder
- sintered body
- alloy
- 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 - Lifetime
Links
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 126
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 98
- 238000004519 manufacturing process Methods 0.000 title abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 201
- 239000000956 alloy Substances 0.000 claims abstract description 154
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 133
- 238000000034 method Methods 0.000 claims abstract description 91
- 230000008569 process Effects 0.000 claims abstract description 45
- 239000001257 hydrogen Substances 0.000 claims abstract description 31
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 31
- 239000011812 mixed powder Substances 0.000 claims abstract description 24
- 238000010298 pulverizing process Methods 0.000 claims abstract description 19
- 238000005245 sintering Methods 0.000 claims abstract description 17
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 15
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052796 boron Inorganic materials 0.000 claims abstract description 10
- 229910052723 transition metal Inorganic materials 0.000 claims abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 5
- 235000012054 meals Nutrition 0.000 claims description 47
- 239000000203 mixture Substances 0.000 claims description 43
- 238000002360 preparation method Methods 0.000 claims description 33
- 150000002431 hydrogen Chemical class 0.000 claims description 16
- 238000010791 quenching Methods 0.000 claims description 12
- 230000000171 quenching effect Effects 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 150000003624 transition metals Chemical class 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 24
- 239000000463 material Substances 0.000 description 22
- 238000005516 engineering process Methods 0.000 description 20
- 239000012071 phase Substances 0.000 description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 14
- 239000001301 oxygen Substances 0.000 description 14
- 229910052760 oxygen Inorganic materials 0.000 description 14
- 238000005266 casting Methods 0.000 description 9
- 239000000314 lubricant Substances 0.000 description 8
- 238000003825 pressing Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 8
- 239000000654 additive Substances 0.000 description 6
- 230000032683 aging Effects 0.000 description 6
- 239000013078 crystal Substances 0.000 description 6
- 238000000227 grinding Methods 0.000 description 6
- 239000012298 atmosphere Substances 0.000 description 5
- 239000011575 calcium Substances 0.000 description 5
- 238000009837 dry grinding Methods 0.000 description 5
- 229910001172 neodymium magnet Inorganic materials 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 238000004064 recycling Methods 0.000 description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 4
- 229910052791 calcium Inorganic materials 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 4
- 239000012299 nitrogen atmosphere Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 229910052779 Neodymium Inorganic materials 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005984 hydrogenation reaction Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229910052720 vanadium Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- 229910052692 Dysprosium Inorganic materials 0.000 description 2
- 229910052689 Holmium Inorganic materials 0.000 description 2
- 229910052771 Terbium Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 229910052733 gallium Inorganic materials 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052765 Lutetium Inorganic materials 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- -1 boron oxide compound Chemical class 0.000 description 1
- 238000009750 centrifugal casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical group [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000003701 mechanical milling Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229910000601 superalloy Inorganic materials 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 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
- H01F1/057—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
- H01F1/0573—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 obtained by reduction or by hydrogen decrepitation or embrittlement
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/0293—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets diffusion of rare earth elements, e.g. Tb, Dy or Ho, into permanent magnets
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Hard Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
Description
样品 | 合金块质量(g)(尺寸:mm×mm×mm) | 烧结密度(g/cm3) | 剩磁Br(T) | 矫顽力iHc(kA/m) |
1 | 250(40×30×28) | 7.42 | 1.15 | 1476 |
2 | 100(30×30×15) | 7.48 | 1.16 | 1496 |
3 | 70(30×28×11) | 7.55 | 1.17 | 1515 |
4 | 50(25×24×11) | 7.55 | 1.17 | 1560 |
5 | 25(20×20×8) | 7.55 | 1.17 | 1576 |
6 | --- | 7.55 | 1.17 | 1578 |
样品 | R(Nd+Pr) | Dy | Co | B | Al | Cu | O | C |
第一细粉 | 29.2 | 2.6 | 0.9 | 1.0 | 0.2 | 0.1 | 6200ppm | 550ppm |
第二细粉 | 28.5 | 3.3 | 0.9 | 1.1 | 0.3 | 0.15 | 5000ppm | 450ppm |
混合比 | 烧结密度(g/cm3) | 剩磁Br(T) | 矫顽力iHc(kA/m) |
15质量% | 7.51 | 1.15 | 1498 |
10质量% | 7.53 | 1.17 | 1561 |
5质量% | 7.55 | 1.17 | 1576 |
0% | 7.55 | 1.17 | 1578 |
Claims (10)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP163401/2001 | 2001-05-30 | ||
JP2001163401 | 2001-05-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1457497A CN1457497A (zh) | 2003-11-19 |
CN1212625C true CN1212625C (zh) | 2005-07-27 |
Family
ID=19006380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNB02800504XA Expired - Lifetime CN1212625C (zh) | 2001-05-30 | 2002-05-28 | 稀土磁体用烧结压制体的制备方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7056393B2 (zh) |
CN (1) | CN1212625C (zh) |
DE (1) | DE10291720T5 (zh) |
WO (1) | WO2002099823A1 (zh) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1300360C (zh) * | 2001-03-30 | 2007-02-14 | 株式会社新王磁材 | 稀土合金烧坯及其制造方法 |
CN100414650C (zh) * | 2001-06-22 | 2008-08-27 | 日立金属株式会社 | 稀土类磁体及其制造方法 |
US7618497B2 (en) * | 2003-06-30 | 2009-11-17 | Tdk Corporation | R-T-B based rare earth permanent magnet and method for production thereof |
CN102050963B (zh) | 2004-08-10 | 2014-03-12 | 日进昌株式会社 | 改性粉末、含有该改性粉末的液态组合物、成形体及改性粉末的制造方法 |
CN101370606B (zh) * | 2005-12-02 | 2013-12-25 | 日立金属株式会社 | 稀土类烧结磁体及其制造方法 |
CN100454449C (zh) * | 2006-04-24 | 2009-01-21 | 严高林 | 退化稀土永磁材料再生高性能永磁体的方法 |
US8142573B2 (en) * | 2007-04-13 | 2012-03-27 | Hitachi Metals, Ltd. | R-T-B sintered magnet and method for producing the same |
RU2446497C1 (ru) * | 2008-02-20 | 2012-03-27 | Улвак, Инк. | Способ переработки отходов магнитов |
US9358614B2 (en) * | 2010-03-31 | 2016-06-07 | Hitachi Metals, Ltd. | Slurry recycling method, producing method of rare earth sintered magnet and slurry recycling apparatus |
EP2827348B1 (en) * | 2012-03-12 | 2022-01-26 | Nitto Denko Corporation | Rare earth permanent magnet and method for producing rare earth permanent magnet |
KR101599663B1 (ko) * | 2012-07-24 | 2016-03-03 | 인터메탈릭스 가부시키가이샤 | NdFeB계 소결 자석의 제조 방법 |
JP6005263B2 (ja) * | 2013-04-24 | 2016-10-12 | 和歌山レアアース株式会社 | R−t−b系磁石用原料合金 |
CN105723480B (zh) | 2013-06-17 | 2018-07-17 | 城市矿业科技有限责任公司 | 磁铁再生以产生磁性性能改善或恢复的Nd-Fe-B磁铁 |
CN103377820B (zh) | 2013-07-17 | 2015-11-25 | 烟台首钢磁性材料股份有限公司 | 一种r-t-b-m系烧结磁体及其制造方法 |
JP5924335B2 (ja) | 2013-12-26 | 2016-05-25 | トヨタ自動車株式会社 | 希土類磁石とその製造方法 |
JP6380738B2 (ja) * | 2014-04-21 | 2018-08-29 | Tdk株式会社 | R−t−b系永久磁石、r−t−b系永久磁石用原料合金 |
CN103996519B (zh) * | 2014-05-11 | 2016-07-06 | 沈阳中北通磁科技股份有限公司 | 一种高性能钕铁硼稀土永磁器件的制造方法 |
DE102014213723A1 (de) * | 2014-07-15 | 2016-01-21 | Siemens Aktiengesellschaft | Verfahren zur Herstellung eines anisotropen weichmagnetischen Materialkörpers und dessen Verwendung |
US9336932B1 (en) | 2014-08-15 | 2016-05-10 | Urban Mining Company | Grain boundary engineering |
JP2016076614A (ja) * | 2014-10-07 | 2016-05-12 | トヨタ自動車株式会社 | 希土類磁石の製造方法 |
JP6205511B2 (ja) * | 2015-01-09 | 2017-09-27 | インターメタリックス株式会社 | RFeB系焼結磁石の製造方法 |
DE102016216355A1 (de) | 2016-08-30 | 2018-03-01 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Verfahren zum Recycling von Permanentmagneten durch Schmelzen und Rascherstarren |
FR3133700A1 (fr) * | 2022-03-16 | 2023-09-22 | Commissariat à l'Energie Atomique et aux Energies Alternatives | Procédé de fabrication d’un aimant à partir d’aimants recyclés |
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 |
US4792368A (en) * | 1982-08-21 | 1988-12-20 | Sumitomo Special Metals Co., Ltd. | Magnetic materials and permanent magnets |
JPH066728B2 (ja) | 1986-07-24 | 1994-01-26 | 住友特殊金属株式会社 | 永久磁石材料用原料粉末の製造方法 |
US5091020A (en) * | 1990-11-20 | 1992-02-25 | Crucible Materials Corporation | Method and particle mixture for making rare earth element, iron and boron permanent sintered magnets |
JPH0696928A (ja) * | 1992-06-30 | 1994-04-08 | Aichi Steel Works Ltd | 希土類焼結磁石及びその製造方法 |
US5624503A (en) * | 1992-12-24 | 1997-04-29 | Matsushita Electric Industrial Co., Ltd. | Process for producing Nd-Fe-B magnet |
JP2746818B2 (ja) | 1993-06-02 | 1998-05-06 | 信越化学工業株式会社 | 希土類焼結永久磁石の製造方法 |
DE69707185T2 (de) * | 1996-04-10 | 2002-06-27 | Showa Denko Kk | Gusslegierung für die Herstellung von Dauermagneten mit seltenen Erden und Verfahren zur Herstellung dieser Legierung und dieser Dauermagneten |
JP3549382B2 (ja) * | 1997-12-22 | 2004-08-04 | 信越化学工業株式会社 | 希土類元素・鉄・ボロン系永久磁石およびその製造方法 |
JPH11329811A (ja) * | 1998-05-18 | 1999-11-30 | Sumitomo Special Metals Co Ltd | R−Fe−B系磁石用原料粉末並びにR−Fe−B系磁石の製造方法 |
DE69911138T2 (de) * | 1998-10-14 | 2004-07-22 | Hitachi Metals, Ltd. | Gesinterter R-T-B-Dauermagnet |
JP3231034B1 (ja) * | 2000-05-09 | 2001-11-19 | 住友特殊金属株式会社 | 希土類磁石およびその製造方法 |
EP1365422B1 (en) * | 2001-01-30 | 2012-04-25 | Hitachi Metals, Ltd. | Method for preparation of permanent magnet |
-
2002
- 2002-05-28 DE DE10291720T patent/DE10291720T5/de not_active Withdrawn
- 2002-05-28 WO PCT/JP2002/005171 patent/WO2002099823A1/en active Application Filing
- 2002-05-28 CN CNB02800504XA patent/CN1212625C/zh not_active Expired - Lifetime
- 2002-05-28 US US10/381,007 patent/US7056393B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CN1457497A (zh) | 2003-11-19 |
US7056393B2 (en) | 2006-06-06 |
DE10291720T5 (de) | 2004-08-05 |
US20040020563A1 (en) | 2004-02-05 |
WO2002099823A1 (en) | 2002-12-12 |
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