JP4623232B2 - 希土類系ボンド磁石 - Google Patents
希土類系ボンド磁石 Download PDFInfo
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- JP4623232B2 JP4623232B2 JP2009554798A JP2009554798A JP4623232B2 JP 4623232 B2 JP4623232 B2 JP 4623232B2 JP 2009554798 A JP2009554798 A JP 2009554798A JP 2009554798 A JP2009554798 A JP 2009554798A JP 4623232 B2 JP4623232 B2 JP 4623232B2
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- 229910052761 rare earth metal Inorganic materials 0.000 title claims description 85
- 150000002910 rare earth metals Chemical group 0.000 title claims description 50
- 239000000843 powder Substances 0.000 claims description 196
- 229920005989 resin Polymers 0.000 claims description 189
- 239000011347 resin Substances 0.000 claims description 189
- 229910003481 amorphous carbon Inorganic materials 0.000 claims description 72
- 238000000576 coating method Methods 0.000 claims description 47
- 239000011248 coating agent Substances 0.000 claims description 45
- 239000011230 binding agent Substances 0.000 claims description 32
- 229910052751 metal Inorganic materials 0.000 claims description 23
- 239000002184 metal Substances 0.000 claims description 23
- 239000002245 particle Substances 0.000 claims description 20
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 14
- 229910052760 oxygen Inorganic materials 0.000 claims description 14
- 239000001301 oxygen Substances 0.000 claims description 14
- 238000000748 compression moulding Methods 0.000 claims description 11
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 7
- 239000001257 hydrogen Substances 0.000 claims description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 6
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- 239000010941 cobalt Substances 0.000 claims description 2
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical group [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 claims 2
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical group [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims 1
- 239000010410 layer Substances 0.000 description 101
- 230000003647 oxidation Effects 0.000 description 34
- 238000007254 oxidation reaction Methods 0.000 description 34
- 238000000034 method Methods 0.000 description 30
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- 238000011156 evaluation Methods 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 10
- 230000002093 peripheral effect Effects 0.000 description 9
- 239000007789 gas Substances 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 7
- 239000000956 alloy Substances 0.000 description 7
- 239000006247 magnetic powder Substances 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
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- 239000003822 epoxy resin Substances 0.000 description 6
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- 230000004888 barrier function Effects 0.000 description 4
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- 238000004519 manufacturing process Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
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- 239000002994 raw material Substances 0.000 description 3
- 229910052692 Dysprosium Inorganic materials 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910001199 N alloy Inorganic materials 0.000 description 2
- 229910052779 Neodymium Inorganic materials 0.000 description 2
- 229910052777 Praseodymium Inorganic materials 0.000 description 2
- 229910052772 Samarium Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910052771 Terbium Inorganic materials 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- ORILYTVJVMAKLC-UHFFFAOYSA-N adamantane Chemical compound C1C(C2)CC3CC1CC2C3 ORILYTVJVMAKLC-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
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- 229920005992 thermoplastic resin Polymers 0.000 description 2
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- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- JHWNWJKBPDFINM-UHFFFAOYSA-N Laurolactam Chemical compound O=C1CCCCCCCCCCCN1 JHWNWJKBPDFINM-UHFFFAOYSA-N 0.000 description 1
- 229910052765 Lutetium Inorganic materials 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
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- 229920000299 Nylon 12 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
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- 239000004642 Polyimide Substances 0.000 description 1
- 239000004734 Polyphenylene sulfide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
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- 238000013459 approach Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
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- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- KJZYNXUDTRRSPN-UHFFFAOYSA-N holmium atom Chemical compound [Ho] KJZYNXUDTRRSPN-UHFFFAOYSA-N 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- OHSVLFRHMCKCQY-UHFFFAOYSA-N lutetium atom Chemical compound [Lu] OHSVLFRHMCKCQY-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
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- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 229920000069 polyphenylene sulfide Polymers 0.000 description 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 description 1
- FRNOGLGSGLTDKL-UHFFFAOYSA-N thulium atom Chemical compound [Tm] FRNOGLGSGLTDKL-UHFFFAOYSA-N 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
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- 238000005303 weighing Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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Classifications
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- 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
- H01F41/026—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 protecting methods against environmental influences, e.g. oxygen, by surface treatment
-
- 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
- H01F1/0578—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 bonded together
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Description
該樹脂層上に形成された非晶質炭素膜と、からなることを特徴とする。
11,21,31:磁石粉末(磁石粒子) 31’:微粉末
12,22,32:樹脂部
13:樹脂層(樹脂塗膜) 14:バインダ樹脂部
23,33:スキン層
91,92,93:非晶質炭素膜
[成形体の作製]
磁石粉末としてd−HDDR処理されたNdFeB系異方性磁石粉末(組成;Fe−12.5at%Nd−6.4at%B−0.5at%Dy−0.3at%Ga−0.2at%Nb)およびSmCo系異方性磁石粉末(組成;Co−19.6at%Fe−10.9at%Sm−7.0at%Cu−2.5at%Zr)(85体積%)と、耐熱性に優れるノボラック型エポキシ樹脂粉末(15体積%)と、を混合したコンパウンドを準備した。なお、準備したNdFeB系異方性磁石粉末の平均粒径は115μm(粗粉末)、SmCo系異方性磁石粉末の平均粒径は12μm(微粉末)であった。粗粉末と微粉末との体積比は80:20とした。NdFeB系異方性磁石粉末にDyを添加することで保磁力が向上し、耐熱性が向上する。上記SmCo系異方性磁石粉末は、Dy入りのNdFeB系異方性磁石粉末と同等の保磁力を有しており、更に、キュリー点が高いため高い耐熱性を有する。
得られた成形体を、鋼製で略有底円筒形状のモータケースの円筒部内に圧入した。なお、本実施例では圧入するだけで成形体をケースに固定しているが、成形体をケースに接着してもよい。次に、成形体の表面(内周面および両端面)にエポキシ樹脂塗料を塗装した。塗料を塗装後125℃で40分間焼成して樹脂塗膜を形成し、磁石本体を得た。
樹脂塗膜を形成しない他は実施例1と同様の手順で、磁石本体の表面にDLC膜を備える希土類系ボンド磁石#C1をもつ耐久評価用試料を作製した。
DLC膜を成膜しない他は実施例1と同様の手順で、磁石本体の表面に樹脂塗膜を備える希土類系ボンド磁石#C2をもつ耐久評価用試料を作製した。
樹脂塗膜およびDLC膜のいずれも形成しない他は実施例1と同様の手順で、表面が未処理の希土類系ボンド磁石#C3をもつ耐久評価用試料を作製した。
上記の各耐久評価用試料を、大気中150℃に1000時間放置して、耐久試験を行った。各試料を150℃のドライオーブンに入れてから、所定の時間で取り出し、室温に冷却した後、磁束計により磁束量を測定することで、各試料の耐酸化性を評価した。耐酸化性は、耐久試験前の試料の磁束量をφ0、所定時間tで取り出した後の磁束量をφtとしたとき、(φt−φ0)×100/φ0[%]で求められる磁束量変化率で評価した。結果を図5に示す。
Claims (12)
- 希土類元素を含む磁石粉末と該磁石粉末を保持するバインダ樹脂部とからなる磁石本体と、
該磁石本体の表層を被覆する樹脂層と、
該樹脂層上に形成された非晶質炭素膜と、
からなることを特徴とする希土類系ボンド磁石。 - 前記バインダ樹脂部および前記樹脂層は、同一の樹脂材料からなる請求項1記載の希土類系ボンド磁石。
- 前記磁石粉末は、平均粒径の異なる磁石粗粉末と磁石微粉末とを含む請求項1または2記載の希土類系ボンド磁石。
- 前記磁石微粉末は、希土類−コバルト系磁石粉末である請求項3記載の希土類系ボンド磁石。
- 前記磁石粗粉末はネオジウム−鉄−硼素(Nd−Fe−B)系磁石粉末であり、
前記磁石微粉末はサマリウム−コバルト(Sm−Co)系磁石粉末である請求項4記載の希土類系ボンド磁石。 - 前記非晶質炭素膜は、炭素を主成分とし、該非晶質炭素膜全体を100原子%としたときに40原子%以下の水素を含む請求項1〜5のいずれかに記載の希土類系ボンド磁石。
- さらに、前記磁石本体の表面と前記非晶質炭素膜との間に、Mを金属または珪素、Cを炭素、Nを窒素、Oを酸素、としたとき、M−C、M−N−C、もしくはM−O−Cで表される結合を有する化合物からなる中間層を有する請求項1〜6のいずれかに記載の希土類系ボンド磁石。
- 前記中間層は、SiC膜またはSiCN膜である請求項7記載の希土類系ボンド磁石。
- 前記磁石本体は、前記磁石粉末と前記バインダ樹脂部とを圧縮成形した成形体からなる請求項1に記載の希土類系ボンド磁石。
- 前記磁石粉末は、前記磁石本体を100体積%としたときに80体積%以上である請求項9に記載の希土類系ボンド磁石。
- 前記樹脂層は樹脂塗膜からなる請求項9または10に記載の希土類系ボンド磁石。
- 前記樹脂層はスキン層である請求項1または2に記載の希土類系ボンド磁石。
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PCT/JP2009/006719 WO2010067592A1 (ja) | 2008-12-12 | 2009-12-09 | 希土類系ボンド磁石 |
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US (1) | US20110234346A1 (ja) |
EP (1) | EP2381452A1 (ja) |
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WO (1) | WO2010067592A1 (ja) |
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JP2016072406A (ja) * | 2014-09-30 | 2016-05-09 | 日亜化学工業株式会社 | ボンド磁石 |
US9818521B2 (en) | 2013-12-13 | 2017-11-14 | Ntn Corporation | Compression-bonded magnet with case and method for producing the same |
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DE102012202687A1 (de) * | 2012-02-22 | 2013-08-22 | Robert Bosch Gmbh | Korrosionsschutzüberzug für Nd2Fe14B-Magnete |
JP6160026B2 (ja) * | 2012-04-24 | 2017-07-12 | Tdk株式会社 | フェライト焼結磁石の製造方法 |
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JP6259673B2 (ja) * | 2014-01-31 | 2018-01-10 | Ntn株式会社 | ケース付き圧縮ボンド磁石の製造方法 |
JP6258689B2 (ja) * | 2013-12-13 | 2018-01-10 | Ntn株式会社 | ケース付き圧縮ボンド磁石 |
US10410779B2 (en) | 2015-10-09 | 2019-09-10 | Lexmark International, Inc. | Methods of making physical unclonable functions having magnetic and non-magnetic particles |
CN107610927A (zh) * | 2017-09-04 | 2018-01-19 | 杭州永磁集团有限公司 | 一种高耐磨粘结钐钴磁体及其制备方法 |
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US20190139909A1 (en) * | 2017-11-09 | 2019-05-09 | Lexmark International, Inc. | Physical Unclonable Functions in Integrated Circuit Chip Packaging for Security |
JP6441445B2 (ja) * | 2017-12-07 | 2018-12-19 | Ntn株式会社 | ケース付き圧縮ボンド磁石 |
JP6449977B2 (ja) * | 2017-12-14 | 2019-01-09 | Ntn株式会社 | ケース付き圧縮ボンド磁石の製造方法 |
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CN112768169B (zh) * | 2020-12-30 | 2023-01-10 | 包头天和磁材科技股份有限公司 | 预制品及其制备方法和耐腐蚀磁体的生产方法及用途 |
WO2024028989A1 (ja) * | 2022-08-02 | 2024-02-08 | 愛知製鋼株式会社 | 予成形体、予成形方法および圧縮ボンド磁石の製造方法 |
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Also Published As
Publication number | Publication date |
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CN102246249A (zh) | 2011-11-16 |
WO2010067592A1 (ja) | 2010-06-17 |
JPWO2010067592A1 (ja) | 2012-05-17 |
EP2381452A1 (en) | 2011-10-26 |
US20110234346A1 (en) | 2011-09-29 |
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