JP2021524678A - 改善された温度安定な軟磁性粉末 - Google Patents
改善された温度安定な軟磁性粉末 Download PDFInfo
- Publication number
- JP2021524678A JP2021524678A JP2021500880A JP2021500880A JP2021524678A JP 2021524678 A JP2021524678 A JP 2021524678A JP 2021500880 A JP2021500880 A JP 2021500880A JP 2021500880 A JP2021500880 A JP 2021500880A JP 2021524678 A JP2021524678 A JP 2021524678A
- Authority
- JP
- Japan
- Prior art keywords
- soft magnetic
- magnetic powder
- silicon
- fluorinating agent
- formula
- 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.)
- Granted
Links
- 239000006247 magnetic powder Substances 0.000 title claims abstract description 103
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 72
- 239000010703 silicon Substances 0.000 claims abstract description 70
- 238000000576 coating method Methods 0.000 claims abstract description 65
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 59
- 239000011248 coating agent Substances 0.000 claims abstract description 58
- 239000000203 mixture Substances 0.000 claims abstract description 42
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 32
- 239000011737 fluorine Substances 0.000 claims abstract description 30
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 9
- 239000012025 fluorinating agent Substances 0.000 claims description 79
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 59
- 238000000034 method Methods 0.000 claims description 56
- 239000011541 reaction mixture Substances 0.000 claims description 26
- -1 silicon alkoxide Chemical class 0.000 claims description 21
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 150000001875 compounds Chemical class 0.000 claims description 8
- 125000003118 aryl group Chemical group 0.000 claims description 4
- 125000002091 cationic group Chemical group 0.000 claims description 4
- 125000001153 fluoro group Chemical group F* 0.000 claims description 4
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- 229910052751 metal Inorganic materials 0.000 description 42
- 239000002184 metal Substances 0.000 description 42
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- 239000000843 powder Substances 0.000 description 32
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- 239000002904 solvent Substances 0.000 description 12
- 239000003054 catalyst Substances 0.000 description 11
- 230000007797 corrosion Effects 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 10
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- 238000006460 hydrolysis reaction Methods 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- 239000008358 core component Substances 0.000 description 9
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
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- 239000000395 magnesium oxide Substances 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 239000010936 titanium Substances 0.000 description 4
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- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
- 239000011261 inert gas Substances 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 239000006249 magnetic particle Substances 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
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- 238000010992 reflux Methods 0.000 description 3
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- 125000001424 substituent group Chemical group 0.000 description 3
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- 239000004593 Epoxy Substances 0.000 description 2
- 229910017082 Fe-Si Inorganic materials 0.000 description 2
- 229910017133 Fe—Si Inorganic materials 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
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- 229910008458 Si—Cr Inorganic materials 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
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- 150000001298 alcohols Chemical class 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
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- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- ZWRUINPWMLAQRD-UHFFFAOYSA-N nonan-1-ol Chemical compound CCCCCCCCCO ZWRUINPWMLAQRD-UHFFFAOYSA-N 0.000 description 2
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- 239000001301 oxygen Substances 0.000 description 2
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- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 description 2
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- AVFZOVWCLRSYKC-UHFFFAOYSA-N 1-methylpyrrolidine Chemical compound CN1CCCC1 AVFZOVWCLRSYKC-UHFFFAOYSA-N 0.000 description 1
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- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910017709 Ni Co Inorganic materials 0.000 description 1
- 229910003267 Ni-Co Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910003262 Ni‐Co Inorganic materials 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
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- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
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- 235000013339 cereals Nutrition 0.000 description 1
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- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 description 1
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- 230000002542 deteriorative effect Effects 0.000 description 1
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- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- JFNLZVQOOSMTJK-KNVOCYPGSA-N norbornene Chemical compound C1[C@@H]2CC[C@H]1C=C2 JFNLZVQOOSMTJK-KNVOCYPGSA-N 0.000 description 1
- 125000003261 o-tolyl group Chemical group [H]C1=C([H])C(*)=C(C([H])=C1[H])C([H])([H])[H] 0.000 description 1
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- SNOOUWRIMMFWNE-UHFFFAOYSA-M sodium;6-[(3,4,5-trimethoxybenzoyl)amino]hexanoate Chemical compound [Na+].COC1=CC(C(=O)NCCCCCC([O-])=O)=CC(OC)=C1OC SNOOUWRIMMFWNE-UHFFFAOYSA-M 0.000 description 1
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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
- H01F1/12—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 soft-magnetic materials
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Abstract
Description
Si1−0.75cMcO2−0.5cFd (I)
(式中、
cは0.01〜0.5の範囲であり、
dは0.04〜2の範囲であり、
MはBまたはAlである)
の少なくとも1種のフッ素含有組成物を含む。
Si1−0.75cMcO2−0.5cFd (I)
のフッ素含有組成物を含む。
[Q][MF4] (II)
(式中、
MはBまたはAlであり;
Qは、H+、Na+、K+、Rb+、Cs+、または[NR1 4]+から選択されるカチオン性基であり、ここで、R1は、−H、−C1〜12−アルキル、−C2〜12−アルケニル、および−C6〜18−アリールからなる群から独立して選択され、それぞれが、式−OR2によって表される少なくとも1個の基で置換されてもよく、ここで、R2は、−H、−C1〜12−アルキル、−C2〜12−アルケニル、および−C1〜18−アリールから独立して選択される)
のものである。
R4は、−Hまたは−(CmH2m+q)−CH3[ここで、m=0の場合はq=0であるという条件で、mは0から6までの整数であり、qは0および−2から選択された整数である]、から選択され、
xは、1から3までの整数である)
からなる群から選択される。
によって表される。
によって表される。
加熱可能な遊星ミキサーには、例えばBASFから入手可能な、100gあたり99.5gの鉄含有量である純度、および4.5〜5μmの間の平均粒径d50を有する2700kgのカルボニル鉄粉を加える。ミキサーに冷却管を装着し、アルゴンでフラッシングして不活性雰囲気を得る。撹拌しながら、480gのエタノールを加える。続いて、TEOSの総量のうちの75質量%を加える(各実験で使用したTEOSの総量を、以下の表1〜6に示す)。次に、NH3濃度が5質量%のNH3水溶液の総量のうちの80質量%を加える(各実験で使用したNH3水溶液の総量を、以下の表1〜6に示す)。ここで、撹拌しながら温度を60℃に上昇させる。この温度で約2時間撹拌した後、フッ素化剤を、濃度が約10〜15質量%のエタノール溶液の形態で反応混合物に加える。残りの25質量%のTEOSおよび残りの20質量%のNH3溶液を、約1時間にわたって加えながら、温度を維持する。混合物を、さらに45分間撹拌する。冷却管を外し、生成物をさらに1時間撹拌する。その時間中に、不活性ガス流を600l/hに増加させ、すでに一部の溶媒が除去されている。1時間後、温度を90℃に上昇させ、生成物を、増加した不活性ガス流下で、乾燥するまで撹拌する。コーティングカルボニル鉄粉を、灰色の粉末として得る。
ホモジナイザー(Polytron(登録商標)から入手可能なロータ/ステータホモジナイザー)および冷却管を装着したフラスコに、355gのエタノールを加え、アルゴンでフラッシングして不活性雰囲気を得る。ホモジナイザーを、2000rpmに設定する。撹拌しながら、例えばBASFから入手可能な、100gあたり99.5gの鉄含有量である純度、および4.5〜5μmの間の平均粒径d50を有する500gのカルボニル鉄粉を加える。ホモジナイザーの速度を、6000rpmに上げる。続いて、TEOSの総量のうちの68質量%を加える(各実験で使用したTEOSの総量を、以下の表7に示す)。次に、NH3濃度が2.5質量%のNH3水溶液の総量の100質量%を加える(各実験で使用したNH3水溶液の総量を、以下の表7に示す)。ここで、撹拌しながら、温度を20分間で45℃に、次に20分間で55℃に、最後に20分間で65℃上昇させる。この温度でさらに約1時間撹拌した後、フッ素化剤を、濃度が約10〜15質量%のエタノール溶液の形態で反応混合物に加える。残りの32質量%のTEOSを素早く加えながら、温度を維持する。混合物を、さらに1時間撹拌する。生成物を、溶媒が除去されるまで、600l/hの不活性ガス流下および遊星ミキサー内で47rpmにて95℃で約3時間撹拌する。乾燥コーティングカルボニル鉄粉を、灰色の粉末として得る。
100gのコーティングカルボニル鉄粉(CIP)を、エポキシ樹脂、例えば、Momentiveから入手可能なEpikote(商標)1004と混合し、混合は、2.8gのエポキシ樹脂を15〜20mLの溶媒(メチルエチルケトンまたはアセトン)中に溶解し、硬化剤として0.14gのジシアンジアミド、例えば、Alzchemから入手可能なDyhard(登録商標)100SHを加えることによって行った。ガラスビーカー内で、コーティングCIPを、1000R/分でディゾルバー式ミキサーを使用して、エポキシ配合物と一緒に撹拌する。混合した後、スラリーをアルミニウムプレートに注ぎ、次に、ドラフト内に8時間置く。得られた乾燥CIPエポキシプレートをナイフミルで10秒間粉砕して、プレス加工可能な粉末を得る。この粉末には、2.8質量%のエポキシ樹脂が含まれる。
6.8g(±0.1g)のプレス加工可能な粉末を、外径が20.1mm、内径が12.5mmであり、結果として高さがおよそ5〜6mmになるリング型の鋼金型内に入れる。プレス加工可能な粉末を、数秒間、440MPaで成形する。そのリングの正確な質量および高さから、リングコアの密度を計算する。透磁率、および抵抗率を測定するために、リングコアを、絶縁した0.85mmの銅線、例えば、Isodrahtから入手可能なMultogan 2000MH62)を20回巻いて配線した。
LRCメータを使用して、リングコアの透磁率を測定した。すべての測定を、0VのDCバイアスによって100kHzで行った。10mAの試験AC電流を、リングコアに印加した。
(式中、Rsampleは、シリンダーの抵抗であり、Rmeterは、メータの内部抵抗であり、VPSは、電源からの印加電圧(=298V)であり、Vmeterは、電圧計からの読み取り値である)。
温度安定性試験が開始できる前に、樹脂を硬化させる。これを、70℃に設定したオーブンにリングコアを入れることによって行う。2時間後、リングコアを、155°Cに設定した第2のオーブンに入れる。2時間後、リングコアを、抵抗率試験のために取り出す。
上記のように圧縮した試料を温度処理した後に、透磁率および抵抗率を測定した。その結果を表1〜7に示す。腐食試験を、表8にまとめる。
さまざまなステンレス鋼材料の腐食を、ステンレス鋼材料(DIN EN 10027−2:1.4541、1.4571、1.4462、1.0425に従う試験材料を含む)の試料(寸法:50×20×2mm)を、T=60℃で4x7日間、それぞれの添加液(additive solution)にさらすことによって試験し、溶液を、毎週未使用の溶液に交換する。試験は、装備されたPTFE容器中で実施した。試験結果を、表8にまとめる。
Claims (16)
- ケイ素系コーティングでコーティングされた軟磁性粉末であって、前記ケイ素系コーティングが、式(I)
Si1−0.75cMcO2−0.5cFd (I)
(式中、
cは0.01〜0.5の範囲であり、
dは0.04〜2の範囲であり、
MはBまたはAlである)
の少なくとも1種のフッ素含有組成物を含む、軟磁性粉末。 - 式(I)(式中、MはBである)の少なくとも1種のフッ素含有組成物を含む、請求項1に記載の軟磁性粉末。
- 前記ケイ素系コーティングが、>5〜45質量%、好ましくは10〜40質量%、特に20〜35質量%の式(I)の少なくとも1種のフッ素含有組成物を含む、請求項1または2に記載の軟磁性粉末。
- 前記フッ素含有組成物のフッ素成分が、SiO2マトリックス内に埋め込まれ、および/またはSiO2コーティングの表面に結合している、請求項1から3のいずれか一項に記載の軟磁性粉末。
- 前記ケイ素系コーティングが、2〜100nmの平均厚さを有する、請求項1から4のいずれか一項に記載の軟磁性粉末。
- 前記軟磁性粉末の総質量に対して、0.1〜10質量%の前記ケイ素系コーティングを含む、請求項1から5のいずれか一項に記載の軟磁性粉末。
- 軟磁性粉末をコーティングするための方法であって、コーティングが、式(I)の組成物を含む少なくとも1種のフッ素含有組成物を含み、前記軟磁性粉末を、少なくとも1種の可溶性フッ素化剤を含むケイ素系溶液と混合し、前記少なくとも1種の可溶性フッ素化剤が、式(II)
[Q][MF4] (II)
(式中、
MはBまたはAlであり;
Qは、H+、Na+、K+、Rb+、Cs+、または[NR1 4]+から選択されるカチオン性基であり、
ここで、R1は、−H、−C1〜12−アルキル、−C2〜12−アルケニル、および−C6〜18−アリールからなる群から独立して選択され、それぞれが、式−OR2によって表される少なくとも1個の基で置換されてもよく、ここで、R2は、−H、−C1〜12−アルキル、−C2〜12−アルケニル、および−C1〜18−アリールから独立して選択される)
の化合物である、方法。 - 前記軟磁性粉末を、ケイ素系溶液と混合し、前記軟磁性粉末を前記ケイ素系溶液により少なくとも部分的に処理した後、前記少なくとも1種の可溶性フッ素化剤を加える、請求項7に記載の方法。
- 前記少なくとも1種の可溶性フッ素化剤が、式(II)
[Q][MF4] (II)
(式中、
MはBから選択され、
Qは、H+または[NR1 4]+から選択されるカチオン性基であり、
ここで、R1は、−H、−C1〜12−アルキル、−C2〜12−アルケニル、および−C6〜18−アリールからなる群から独立して選択され、それぞれが、式−OR2によって表される少なくとも1個の基で置換されてもよく、ここで、R2は、−H、−C1〜12−アルキル、−C2〜12−アルケニル、および−C1〜18−アリールから独立して選択される)
の化合物である、請求項7または8に記載の方法。 - 前記可溶性フッ素化剤が、HBF4、[NH4][BF4]、および[(R4−O−R3)x−NH3−x][BF4]
(式中、
R3は、式−(CnH2n+p)−の基を表し;
nは、1から6までの整数であり、
pは、0および−2から選択される整数であり、
R4は、−Hまたは−(CmH2m+q)−CH3から選択され、
m=0の場合はq=0であるという条件で、
mは、0から6までの整数であり、
qは、0および−2から選択される整数であり、
xは、1〜3から選択される整数である)
からなる群から選択される、請求項7から9のいずれか一項に記載の方法。 - 前記可溶性フッ素化剤が、0℃で少なくとも15質量%、好ましくは少なくとも20質量%のエタノール中での溶解度を有する、請求項7から10のいずれか一項に記載の方法。
- 前記可溶性フッ素化剤を、前記ケイ素系溶液による処理中、または前記ケイ素系溶液による前記処理の直後に加える、請求項7から11のいずれか一項に記載の方法。
- 軟磁性粉末1kgあたり0.1〜10mmolのフッ素化剤を、前記ケイ素系溶液に加える、請求項7から12のいずれか一項に記載の方法。
- 前記ケイ素系溶液が、1または複数の工程において反応混合物に加えられるケイ素アルコキシドを含む、請求項7から13のいずれか一項に記載の方法。
- 電子部品の製造のために、請求項1から6のいずれか一項に記載の軟磁性粉末、または請求項7から14のいずれか一項に記載の方法から得られた軟磁性粉末を使用する方法。
- 請求項1から6のいずれか一項に記載の軟磁性粉末、または請求項7から14のいずれか一項に記載の方法から得られた軟磁性粉末を含む、電子部品。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18182824 | 2018-07-11 | ||
EP18182824.5 | 2018-07-11 | ||
PCT/EP2019/068392 WO2020011779A1 (en) | 2018-07-11 | 2019-07-09 | Improved temperature-stable soft-magnetic powder |
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EP2871646A1 (en) * | 2013-11-06 | 2015-05-13 | Basf Se | Temperature-stable soft-magnetic powder |
JP2017188680A (ja) * | 2016-03-31 | 2017-10-12 | Ntn株式会社 | 磁性材料、磁性コアおよびその製造方法 |
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DE3428121A1 (de) | 1984-07-31 | 1986-02-13 | Basf Ag, 6700 Ludwigshafen | Verfahren zur herstellung von eisenpulver |
SU1765240A1 (ru) | 1989-09-12 | 1992-09-30 | Институт Металлургии Им.А.А.Байкова | Магнитно-м гкий сплав |
DE3940347C2 (de) | 1989-12-06 | 1997-02-20 | Basf Ag | Verfahren zur Herstellung von Eisenwhiskers |
RU2070941C1 (ru) | 1992-06-26 | 1996-12-27 | Информационный сервис-центр "НИКОС" | Аморфный магнитно-мягкий сплав |
DE19807634A1 (de) * | 1997-05-23 | 1998-11-26 | Agfa Gevaert Ag | Beschichtete Partikel |
JP4961454B2 (ja) * | 2009-05-12 | 2012-06-27 | 株式会社日立製作所 | 希土類磁石及びこれを用いたモータ |
JP2012230958A (ja) | 2011-04-25 | 2012-11-22 | Mitsumi Electric Co Ltd | 磁性粒子、高周波用磁性材料及び高周波デバイス |
US20150010826A1 (en) * | 2012-01-13 | 2015-01-08 | Rockwood Lithium GmbH | Stabilized lithium metal impressions coated with alloy-forming elements and method for production thereof |
CN104028748B (zh) * | 2014-05-28 | 2015-12-02 | 浙江大学 | 一种软磁复合材料的表面硼化绝缘包覆方法 |
US10497500B2 (en) * | 2014-09-08 | 2019-12-03 | Toyota Jidosha Kabuhiki Kaisha | Powder magnetic core, powder for magnetic cores, and methods of manufacturing them |
TW202006074A (zh) | 2018-07-11 | 2020-02-01 | 德商巴斯夫歐洲公司 | 改良的溫度穩定型軟磁粉末 |
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JP2009117471A (ja) * | 2007-11-02 | 2009-05-28 | Toyota Central R&D Labs Inc | 磁心用粉末及び圧粉磁心並びにそれらの製造方法 |
US20100266861A1 (en) * | 2007-11-02 | 2010-10-21 | Toyota Jidosha Kabushiki Kaisha | Powder for magnetic core, powder magnetic core and their production methods |
EP2871646A1 (en) * | 2013-11-06 | 2015-05-13 | Basf Se | Temperature-stable soft-magnetic powder |
JP2016538720A (ja) * | 2013-11-06 | 2016-12-08 | ビーエーエスエフ ソシエタス・ヨーロピアBasf Se | 温度安定性軟磁性粉末 |
JP2017188680A (ja) * | 2016-03-31 | 2017-10-12 | Ntn株式会社 | 磁性材料、磁性コアおよびその製造方法 |
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EP3821450A1 (en) | 2021-05-19 |
US20210291264A1 (en) | 2021-09-23 |
WO2020011779A1 (en) | 2020-01-16 |
JP7455803B2 (ja) | 2024-03-26 |
TW202006074A (zh) | 2020-02-01 |
PH12020552251A1 (en) | 2021-08-16 |
KR102643789B1 (ko) | 2024-03-07 |
EP3821450B1 (en) | 2024-04-10 |
US12002609B2 (en) | 2024-06-04 |
IL279904A (en) | 2021-03-01 |
CN112385000A (zh) | 2021-02-19 |
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