JP5105038B2 - 粉末永久磁石材料の製造方法及び粉末永久磁石材料 - Google Patents
粉末永久磁石材料の製造方法及び粉末永久磁石材料 Download PDFInfo
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- JP5105038B2 JP5105038B2 JP2005255016A JP2005255016A JP5105038B2 JP 5105038 B2 JP5105038 B2 JP 5105038B2 JP 2005255016 A JP2005255016 A JP 2005255016A JP 2005255016 A JP2005255016 A JP 2005255016A JP 5105038 B2 JP5105038 B2 JP 5105038B2
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- Prior art keywords
- permanent magnet
- magnet material
- cobalt
- reducing agent
- powder
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- 239000000843 powder Substances 0.000 title claims description 35
- 239000000463 material Substances 0.000 title claims description 16
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 37
- 229910001297 Zn alloy Inorganic materials 0.000 claims description 20
- HSSJULAPNNGXFW-UHFFFAOYSA-N [Co].[Zn] Chemical compound [Co].[Zn] HSSJULAPNNGXFW-UHFFFAOYSA-N 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 20
- 239000011701 zinc Substances 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 9
- 229910052796 boron Inorganic materials 0.000 claims description 8
- -1 tetrahydroborate Chemical compound 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- ACVYVLVWPXVTIT-UHFFFAOYSA-M phosphinate Chemical compound [O-][PH2]=O ACVYVLVWPXVTIT-UHFFFAOYSA-M 0.000 claims description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims 5
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 claims 1
- 150000001868 cobalt Chemical class 0.000 claims 1
- 229910001429 cobalt ion Inorganic materials 0.000 claims 1
- XLJKHNWPARRRJB-UHFFFAOYSA-N cobalt(2+) Chemical compound [Co+2] XLJKHNWPARRRJB-UHFFFAOYSA-N 0.000 claims 1
- 239000011259 mixed solution Substances 0.000 claims 1
- 150000003751 zinc Chemical class 0.000 claims 1
- 238000006722 reduction reaction Methods 0.000 description 21
- 230000005415 magnetization Effects 0.000 description 11
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 10
- 229910052725 zinc Inorganic materials 0.000 description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 7
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 7
- 229910017052 cobalt Inorganic materials 0.000 description 6
- 239000010941 cobalt Substances 0.000 description 6
- 229910052761 rare earth metal Inorganic materials 0.000 description 6
- 150000002910 rare earth metals Chemical class 0.000 description 6
- KWSLGOVYXMQPPX-UHFFFAOYSA-N 5-[3-(trifluoromethyl)phenyl]-2h-tetrazole Chemical compound FC(F)(F)C1=CC=CC(C2=NNN=N2)=C1 KWSLGOVYXMQPPX-UHFFFAOYSA-N 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 229910001379 sodium hypophosphite Inorganic materials 0.000 description 5
- RZLVQBNCHSJZPX-UHFFFAOYSA-L zinc sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Zn+2].[O-]S([O-])(=O)=O RZLVQBNCHSJZPX-UHFFFAOYSA-L 0.000 description 5
- 229910052779 Neodymium Inorganic materials 0.000 description 4
- 229910052772 Samarium Inorganic materials 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 4
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 4
- 229910000859 α-Fe Inorganic materials 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- GFHNAMRJFCEERV-UHFFFAOYSA-L cobalt chloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Co+2] GFHNAMRJFCEERV-UHFFFAOYSA-L 0.000 description 3
- MEYVLGVRTYSQHI-UHFFFAOYSA-L cobalt(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Co+2].[O-]S([O-])(=O)=O MEYVLGVRTYSQHI-UHFFFAOYSA-L 0.000 description 3
- 239000011574 phosphorus Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229910000828 alnico Inorganic materials 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000008139 complexing agent Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000012279 sodium borohydride Substances 0.000 description 2
- 229910000033 sodium borohydride Inorganic materials 0.000 description 2
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000009689 gas atomisation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010299 mechanically pulverizing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
Landscapes
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Powder Metallurgy (AREA)
- Hard Magnetic Materials (AREA)
Description
なお、永久磁石用の粉末の製造方法として、一般的には金属やセラミックの塊(バルク)を機械的に粉砕する物理的な方法がある。また、一部、希土類磁石では急冷凝固法により薄帯(リボン)を作製した後、粉砕するという方法もとられている(例えば特許文献1参照)。しかし、これらの機械的な粉砕方法では形状や粒度が揃った粉末を作製するのが難しく、特に球形の微粉末の製造は難しい。
また、ガスアトマイズ法などで球状の粉末を作製する(例えば特許文献2参照)ことが可能であるが、ガスアトマイズ法は金属を溶解した後ガスで急冷するため、工程が複雑で、また微粉末の製造には向かない。
現在生産量が著しく増加している高性能なサマリウム・コバルト磁石やネオジウム・鉄・ボロン磁石などの希土類磁石は、サマリウムやネオジウムなどの希土類金属を主成分の一つとするため価格が高く、耐食性が悪い。また、フェライト磁石は、酸化物からなるため、耐食性はよいが、酸化物であるため遷移金属の量が少なく、そのため飽和磁化が小さいという欠点がある。
本発明は、従来の永久磁石材料とは異なる組成で、形状や粒度が揃った粉末磁石材料を、従来と異なる方法により製造する。すなわち、本発明は、コバルトと亜鉛をベースとした新しい粉末磁石材料を製造する。
これらの合金粉末は金属であり、高い飽和磁化を有し、そのまま永久磁石として使用可能な磁気特性を示す。また、化学還元法により作製したコバルト亜鉛合金粉末は樹脂などで結合することによりボンド磁石としても使用できる。
Claims (5)
- コバルト塩水溶液と亜鉛塩水溶液の混合液に還元剤水溶液を混合して、コバルトイオンと亜鉛イオンを同時に還元することにより、形状が球形で、平均粒径が0.1-2.0μmのコバルト亜鉛合金粉末からなる永久磁石材料を得ることを特徴とする粉末永久磁石材料の製造方法。
- 前記還元剤水溶液に含まれる還元剤が、ホスフィン酸塩であることを特徴とする請求項1に記載の粉末永久磁石材料の製造方法。
- 前記還元剤水溶液に含まれる還元剤が、テトラヒドロホウ酸塩であることを特徴とする請求項1に記載の粉末永久磁石材料の製造方法。
- 請求項1ないし3のいずれかに記載の方法により製造された粉末永久磁石材料であって、形状が球形であり、平均粒径が0.1-2.0μmであることを特徴とする粉末永久磁石材料。
- 組成が、Co1-mZnmX で表現される請求項4に記載の粉末永久磁石材料(ただし、Xは還元剤から来るPまたはB、組成比率は0<m≦25原子%である。)。
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JP2005255016A JP5105038B2 (ja) | 2005-09-02 | 2005-09-02 | 粉末永久磁石材料の製造方法及び粉末永久磁石材料 |
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JP2005255016A JP5105038B2 (ja) | 2005-09-02 | 2005-09-02 | 粉末永久磁石材料の製造方法及び粉末永久磁石材料 |
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JP2007063657A JP2007063657A (ja) | 2007-03-15 |
JP5105038B2 true JP5105038B2 (ja) | 2012-12-19 |
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Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5439339B2 (ja) * | 1972-01-27 | 1979-11-27 | ||
JPH04289107A (ja) * | 1991-03-15 | 1992-10-14 | Nisshin Steel Co Ltd | 合金微粒子の製造方法 |
JP3343283B2 (ja) * | 1993-11-22 | 2002-11-11 | 株式会社ノリタケカンパニーリミテド | 銀−パラジウム共沈粉末及びその製造方法 |
JP2000087120A (ja) * | 1996-11-08 | 2000-03-28 | Akita Pref Gov Shigen Gijutsu Kaihatsu Kiko | 球状アモルファスCo−P合金粉末およびその製造法 |
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