DE10032515B4 - Verfahren zur Herstellung eines Seltenerd-Sintermagnets - Google Patents
Verfahren zur Herstellung eines Seltenerd-Sintermagnets Download PDFInfo
- Publication number
- DE10032515B4 DE10032515B4 DE10032515A DE10032515A DE10032515B4 DE 10032515 B4 DE10032515 B4 DE 10032515B4 DE 10032515 A DE10032515 A DE 10032515A DE 10032515 A DE10032515 A DE 10032515A DE 10032515 B4 DE10032515 B4 DE 10032515B4
- Authority
- DE
- Germany
- Prior art keywords
- magnet
- rare earth
- weight
- density
- orientation
- 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 43
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 230000005291 magnetic effect Effects 0.000 claims abstract description 96
- 239000002002 slurry Substances 0.000 claims abstract description 41
- 239000003921 oil Substances 0.000 claims abstract description 36
- 235000019198 oils Nutrition 0.000 claims abstract description 36
- 239000000843 powder Substances 0.000 claims abstract description 28
- 238000005245 sintering Methods 0.000 claims abstract description 19
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 16
- 239000000956 alloy Substances 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims abstract description 15
- 239000002480 mineral oil Substances 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 235000010446 mineral oil Nutrition 0.000 claims abstract description 13
- 238000010298 pulverizing process Methods 0.000 claims abstract description 12
- 239000002736 nonionic surfactant Substances 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims abstract description 10
- 239000003945 anionic surfactant Substances 0.000 claims abstract description 8
- 235000015112 vegetable and seed oil Nutrition 0.000 claims abstract description 6
- 239000008158 vegetable oil Substances 0.000 claims abstract description 6
- 230000001590 oxidative effect Effects 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 33
- 239000001301 oxygen Substances 0.000 claims description 33
- 229910052760 oxygen Inorganic materials 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 32
- 229910052742 iron Inorganic materials 0.000 claims description 21
- 230000004907 flux Effects 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 13
- 238000009826 distribution Methods 0.000 claims description 10
- 238000000748 compression moulding Methods 0.000 claims description 8
- 230000005415 magnetization Effects 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 39
- 230000000052 comparative effect Effects 0.000 description 39
- 239000004094 surface-active agent Substances 0.000 description 32
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 29
- 238000000465 moulding Methods 0.000 description 24
- 125000001931 aliphatic group Chemical group 0.000 description 18
- 150000002148 esters Chemical class 0.000 description 17
- 238000002441 X-ray diffraction Methods 0.000 description 14
- 229910052757 nitrogen Inorganic materials 0.000 description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 12
- 229910052799 carbon Inorganic materials 0.000 description 12
- 238000005259 measurement Methods 0.000 description 9
- 239000002253 acid Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- -1 rare earth carbides Chemical class 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 239000012535 impurity Substances 0.000 description 6
- 230000006872 improvement Effects 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 150000005846 sugar alcohols Polymers 0.000 description 5
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 4
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 4
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 4
- 229910052692 Dysprosium Inorganic materials 0.000 description 4
- 229910052779 Neodymium Inorganic materials 0.000 description 4
- 239000005642 Oleic acid Substances 0.000 description 4
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 4
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 4
- PRXRUNOAOLTIEF-ADSICKODSA-N Sorbitan trioleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](OC(=O)CCCCCCC\C=C/CCCCCCCC)[C@H]1OC[C@H](O)[C@H]1OC(=O)CCCCCCC\C=C/CCCCCCCC PRXRUNOAOLTIEF-ADSICKODSA-N 0.000 description 4
- 150000003973 alkyl amines Chemical class 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 4
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 229910052777 Praseodymium Inorganic materials 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 229910052733 gallium Inorganic materials 0.000 description 3
- 229910000765 intermetallic Inorganic materials 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 238000004381 surface treatment Methods 0.000 description 3
- JNYAEWCLZODPBN-JGWLITMVSA-N (2r,3r,4s)-2-[(1r)-1,2-dihydroxyethyl]oxolane-3,4-diol Chemical compound OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O JNYAEWCLZODPBN-JGWLITMVSA-N 0.000 description 2
- LDVVTQMJQSCDMK-UHFFFAOYSA-N 1,3-dihydroxypropan-2-yl formate Chemical compound OCC(CO)OC=O LDVVTQMJQSCDMK-UHFFFAOYSA-N 0.000 description 2
- RZRNAYUHWVFMIP-KTKRTIGZSA-N 1-oleoylglycerol Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCC(O)CO RZRNAYUHWVFMIP-KTKRTIGZSA-N 0.000 description 2
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 2
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical class C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- 239000004147 Sorbitan trioleate Substances 0.000 description 2
- 150000005215 alkyl ethers Chemical class 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 229910052735 hafnium Inorganic materials 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- RZRNAYUHWVFMIP-UHFFFAOYSA-N monoelaidin Natural products CCCCCCCCC=CCCCCCCCC(=O)OCC(O)CO RZRNAYUHWVFMIP-UHFFFAOYSA-N 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229960000391 sorbitan trioleate Drugs 0.000 description 2
- 235000019337 sorbitan trioleate Nutrition 0.000 description 2
- 239000000600 sorbitol Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 229910017061 Fe Co Inorganic materials 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 235000014593 oils and fats Nutrition 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 229910052721 tungsten 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
Images
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
- H01F1/06—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 in the form of particles, e.g. powder
- H01F1/08—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 in the form of particles, e.g. powder pressed, sintered, or bound together
-
- 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
- H01F41/0273—Imparting anisotropy
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
- Powder Metallurgy (AREA)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19035199 | 1999-07-05 | ||
| JP32959099 | 1999-11-19 | ||
| JP11-190351 | 1999-11-19 | ||
| JP11-329590 | 1999-11-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE10032515A1 DE10032515A1 (de) | 2001-01-18 |
| DE10032515B4 true DE10032515B4 (de) | 2012-09-27 |
Family
ID=26506028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE10032515A Expired - Lifetime DE10032515B4 (de) | 1999-07-05 | 2000-07-05 | Verfahren zur Herstellung eines Seltenerd-Sintermagnets |
Country Status (5)
| Country | Link |
|---|---|
| US (2) | US6312494B1 (enExample) |
| JP (1) | JP2001210508A (enExample) |
| KR (1) | KR100651147B1 (enExample) |
| CN (1) | CN1238866C (enExample) |
| DE (1) | DE10032515B4 (enExample) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6635120B2 (en) * | 2000-09-14 | 2003-10-21 | Hitachi Metals, Ltd. | Method for producing sintered rare earth magnet and sintered ring magnet |
| DE60335331D1 (de) * | 2002-10-08 | 2011-01-27 | Hitachi Metals Ltd | R-Fe-B gesinterter Permanentmagnet und Verfahren zu dessen Herstellung |
| CN100431062C (zh) * | 2002-10-08 | 2008-11-05 | 日立金属株会社 | 烧结型R-Fe-B系永磁体及其制造方法 |
| US7199690B2 (en) | 2003-03-27 | 2007-04-03 | Tdk Corporation | R-T-B system rare earth permanent magnet |
| US20050062572A1 (en) * | 2003-09-22 | 2005-03-24 | General Electric Company | Permanent magnet alloy for medical imaging system and method of making |
| US20070221296A1 (en) * | 2004-06-25 | 2007-09-27 | Tdk Corporation | Rare Earth Sintered Magnet, Raw Material Alloy Powder For Rare Earth Sintered Magnet, And Process For Producing Rare Earth Sintered Magnet |
| JP4716051B2 (ja) * | 2008-02-20 | 2011-07-06 | Ｔｄｋ株式会社 | 焼結磁石の製造方法 |
| KR101261099B1 (ko) * | 2010-04-20 | 2013-05-06 | 선문대학교 산학협력단 | 희토류 소결자석 제조방법 |
| CN103887028B (zh) * | 2012-12-24 | 2017-07-28 | 北京中科三环高技术股份有限公司 | 一种烧结钕铁硼磁体及其制造方法 |
| CN105474337B (zh) * | 2013-09-02 | 2017-12-08 | 日立金属株式会社 | R‑t‑b系烧结磁体的制造方法 |
| CN104184236B (zh) * | 2014-09-05 | 2016-09-14 | 宁波市北仑海伯精密机械制造有限公司 | 用于电机的永磁体及其该永磁体的设计方法 |
| CN105033204B (zh) * | 2015-06-30 | 2017-08-08 | 厦门钨业股份有限公司 | 一种用于烧结磁体的急冷合金片 |
| JP6743549B2 (ja) * | 2016-07-25 | 2020-08-19 | Tdk株式会社 | Ｒ−ｔ−ｂ系焼結磁石 |
| JP7315888B2 (ja) * | 2018-05-29 | 2023-07-27 | Tdk株式会社 | Ｒ－ｔ－ｂ系永久磁石およびその製造方法 |
| CN111916283A (zh) * | 2020-07-26 | 2020-11-10 | 烟台首钢磁性材料股份有限公司 | 一种圆环状烧结钕铁硼磁体的制备方法及其成型模具 |
| CN111739729A (zh) * | 2020-08-08 | 2020-10-02 | 江西开源自动化设备有限公司 | 一种烧结钕铁硼的制造方法 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0251233A1 (en) * | 1986-06-26 | 1988-01-07 | Research Development Corporation of Japan | Anisotropic rare earth magnet material and production process thereof |
| EP0270934A1 (en) * | 1986-11-26 | 1988-06-15 | Tokin Corporation | A method for producing a rare earth metal-iron-boron anisotropic sintered magnet from rapidly-quenched rare earth metal-iron-boron alloy ribbon-like flakes |
| EP0284033A1 (en) * | 1987-03-23 | 1988-09-28 | Tokin Corporation | A method for producing a rare earth metal-iron-boron anisotropic bonded magnet from rapidly-quenched rare earth metal-iron-boron alloy ribbon-like flakes |
| US4973415A (en) * | 1986-10-30 | 1990-11-27 | Ryoji Ohmachi | Rapidly quenched ribbon magnet and plastic magnet containing powders of the rapidly quenched ribbon magnet |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4888506A (en) * | 1987-07-09 | 1989-12-19 | Hitachi Metals, Ltd. | Voice coil-type linear motor |
| US5648039A (en) * | 1992-04-24 | 1997-07-15 | Tdk Corporation | Process for the production of anisotropic ferrite magnets |
| JP2731337B2 (ja) * | 1993-03-19 | 1998-03-25 | 日立金属株式会社 | 希土類焼結磁石の製造方法 |
| US5489343A (en) | 1993-01-29 | 1996-02-06 | Hitachi Metals, Ltd. | Method for producing R-Fe-B-based, sintered magnet |
| JP2859517B2 (ja) | 1993-08-12 | 1999-02-17 | 日立金属株式会社 | 希土類磁石の製造方法 |
| JP3209380B2 (ja) * | 1993-07-21 | 2001-09-17 | 日立金属株式会社 | 希土類焼結磁石およびその製造方法 |
| JPH08130142A (ja) | 1994-11-01 | 1996-05-21 | Hitachi Metals Ltd | 希土類磁石の製造方法 |
| JP2897871B2 (ja) * | 1995-08-11 | 1999-05-31 | ティーディーケイ株式会社 | 磁石粉末、焼結磁石、ボンディッド磁石および磁気記録媒体 |
| US6159308A (en) * | 1997-12-12 | 2000-12-12 | Hitachi Metals, Ltd. | Rare earth permanent magnet and production method thereof |
-
2000
- 2000-06-29 JP JP2000196345A patent/JP2001210508A/ja active Pending
- 2000-07-05 CN CNB001262920A patent/CN1238866C/zh not_active Expired - Lifetime
- 2000-07-05 DE DE10032515A patent/DE10032515B4/de not_active Expired - Lifetime
- 2000-07-05 US US09/610,476 patent/US6312494B1/en not_active Ceased
- 2000-07-05 KR KR1020000038359A patent/KR100651147B1/ko not_active Expired - Lifetime
-
2003
- 2003-11-05 US US10/701,020 patent/USRE40348E1/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0251233A1 (en) * | 1986-06-26 | 1988-01-07 | Research Development Corporation of Japan | Anisotropic rare earth magnet material and production process thereof |
| US4973415A (en) * | 1986-10-30 | 1990-11-27 | Ryoji Ohmachi | Rapidly quenched ribbon magnet and plastic magnet containing powders of the rapidly quenched ribbon magnet |
| EP0270934A1 (en) * | 1986-11-26 | 1988-06-15 | Tokin Corporation | A method for producing a rare earth metal-iron-boron anisotropic sintered magnet from rapidly-quenched rare earth metal-iron-boron alloy ribbon-like flakes |
| US4881986A (en) * | 1986-11-26 | 1989-11-21 | Tokin Corporation | Method for producing a rare earth metal-iron-boron anisotropic sintered magnet from rapidly-quenched rare earth metal-iron-boron alloy ribbon-like flakes |
| EP0284033A1 (en) * | 1987-03-23 | 1988-09-28 | Tokin Corporation | A method for producing a rare earth metal-iron-boron anisotropic bonded magnet from rapidly-quenched rare earth metal-iron-boron alloy ribbon-like flakes |
Also Published As
| Publication number | Publication date |
|---|---|
| US6312494B1 (en) | 2001-11-06 |
| CN1283857A (zh) | 2001-02-14 |
| USRE40348E1 (en) | 2008-06-03 |
| KR20010015183A (ko) | 2001-02-26 |
| KR100651147B1 (ko) | 2006-11-28 |
| CN1238866C (zh) | 2006-01-25 |
| DE10032515A1 (de) | 2001-01-18 |
| JP2001210508A (ja) | 2001-08-03 |
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