JP7416212B2 - 軟磁性合金粉末、磁心、磁気応用部品およびノイズ抑制シート - Google Patents
軟磁性合金粉末、磁心、磁気応用部品およびノイズ抑制シート Download PDFInfo
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- JP7416212B2 JP7416212B2 JP2022512088A JP2022512088A JP7416212B2 JP 7416212 B2 JP7416212 B2 JP 7416212B2 JP 2022512088 A JP2022512088 A JP 2022512088A JP 2022512088 A JP2022512088 A JP 2022512088A JP 7416212 B2 JP7416212 B2 JP 7416212B2
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 2
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- 229910052582 BN Inorganic materials 0.000 description 1
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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
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- 229910000519 Ferrosilicon Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
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- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
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- DMFGNRRURHSENX-UHFFFAOYSA-N beryllium copper Chemical compound [Be].[Cu] DMFGNRRURHSENX-UHFFFAOYSA-N 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
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- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- 238000001938 differential scanning calorimetry curve Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
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- VAKIVKMUBMZANL-UHFFFAOYSA-N iron phosphide Chemical compound P.[Fe].[Fe].[Fe] VAKIVKMUBMZANL-UHFFFAOYSA-N 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
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- DPTATFGPDCLUTF-UHFFFAOYSA-N phosphanylidyneiron Chemical compound [Fe]#P DPTATFGPDCLUTF-UHFFFAOYSA-N 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
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- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/08—Metallic powder characterised by particles having an amorphous microstructure
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- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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- 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
- H01F1/14—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 metals or alloys
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- 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
- H01F1/14—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 metals or alloys
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- 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
- H01F1/14—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 metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
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- B82—NANOTECHNOLOGY
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Description
しかしながら、本発明は、以下の構成に限定されるものではなく、本発明の要旨を変更しない範囲において適宜変更して適用することができる。なお、以下において記載する各実施形態の望ましい構成を2つ以上組み合わせたものもまた本発明である。
本発明の軟磁性合金粉末は、非晶質相を有する軟磁性合金粒子を含む。上記軟磁性合金粒子は、所定の化学組成を有し、上記軟磁性合金粒子の二次元投影形状の平均の短軸長/長軸長の比が0.69以上1以下であることを特徴とする。
図1に示す軟磁性合金粉末1に含まれる軟磁性合金粒子10について、図2に示すように、長軸長Xに対する短軸長Yの比(Y/X)を求める。ここで、軟磁性合金粒子10の長軸とは、粒子の輪郭上における任意の2点間を結ぶ直線のうち、最も長い直線を意味する。一方、軟磁性合金粒子10の短軸とは、粒子の輪郭上における任意の2点間を結ぶ直線のうち、長軸を2等分する点を通り、かつ長軸と直交する直線を意味する。
図3に示すコイル100は、本発明の軟磁性合金粉末を含む磁心110と、磁心110に巻回される一次巻線120および二次巻線130とを備える。図3に示すコイル100では、環状のトロイダル形状を有する磁心110に、一次巻線120および二次巻線130がバイファイラ巻きされている。
原材料を所定の化学組成になるように秤量した。原材料の合計の重量は150gとした。Feの原材料は東邦亜鉛株式会社製のマイロン(純度99.95%)を用いた。Siの原材料は株式会社高純度化学研究所製の粒状シリコン(純度99.999%)を用いた。Bの原材料は株式会社高純度化学研究所製の粒状硼素(純度99.5%)を用いた。Cの原材料は株式会社高純度化学研究所製の粉末状黒鉛(純度99.95%)を用いた。Pの原材料は株式会社高純度化学研究所製の塊状リン化鉄Fe3P(純度99%)を用いた。Cuの原材料は株式会社高純度化学研究所製のチップ状銅(純度99.9%)を用いた。Snの原材料は株式会社高純度化学研究所製の粒状錫(純度99.9%)を用いた。
Bs=4π・Ms・ρ ・・・(1)
Va=Ia/(Ia+Ic) ・・・(2)
Vc=Ic/(Ia+Ic) ・・・(3)
試料1~55の第一結晶化開始温度および第二結晶化開始温度を示差走査熱量計(DSC)で測定した。室温から650℃まで20℃/minで昇温し、各温度における試料の発熱を測定した。この際、プラチナ製の試料容器を用いた。雰囲気はアルゴン(99.999%)を選択し、ガスフロー速度は1L/minとした。試料の量は15mg~20mgとした。結晶化による発熱が開始される温度以下のDSC曲線の接線と、結晶化反応による試料の発熱ピークの立ち上がりにおける最大傾き接線との交点を結晶化開始温度とした。
D=K・λ/(β・cosθ)・・・・・・・・(4)
実施例2で作製した軟磁性合金粉末の表面に絶縁皮膜を形成した。軟磁性合金粒子30gに対し、イソプロピルアルコール(IPA)8.5g、9%アンモニア水8.5g、30%プライサーフALを1.14g混合した。次いで、IPA7.9gとテトラエトキシシラン(TEOS)2.1gの混合溶液を1.0gずつ3回に分けて混合し、ろ紙でろ過した。ろ紙で回収した試料をアセトンで洗浄したのち、80℃の温度条件で60分加熱乾燥し、140℃の温度条件で30分熱処理し、複合軟磁性合金粉末を得た。
10 軟磁性合金粒子
100 コイル
110 磁心
120 一次巻線
130 二次巻線
X 長軸長
Y 短軸長
Claims (7)
- 非晶質相を有する軟磁性合金粒子を含み、
前記軟磁性合金粒子は、FeaSibBcCdPeCufSngM1hM2iで表される化学組成を有し、
M1は、CoおよびNiのうちの1種類以上の元素であり、
M2は、Zr、Hf、Nb、Ta、Mo、Cr、AlおよびMnのうちの1種類以上の元素であり、
79≦a+h+i≦86、0≦b≦5、7.2≦c≦12.2、0.1≦d≦3、7.3≦c+d≦13.2、0.5≦e≦10、0.4≦f≦2、0.3≦g≦6、0≦h≦30、0≦i≦5かつa+b+c+d+e+f+g+h+i=100(モル部)を満たし、
前記軟磁性合金粒子の二次元投影形状の平均の短軸長/長軸長の比が0.69以上1以下である、軟磁性合金粉末。 - 前記軟磁性合金粒子は、前記化学組成の成分合計を100重量%としたとき、0.5重量%以下のSをさらに含む、請求項1に記載の軟磁性合金粉末。
- 前記軟磁性合金粒子に占める前記非晶質相の体積割合が10%以上である、請求項1または2に記載の軟磁性合金粉末。
- 前記軟磁性合金粒子に含まれる結晶相の結晶粒径が5nm以上30nm以下である、請求項1~3のいずれか1項に記載の軟磁性合金粉末。
- 請求項1~4のいずれか1項に記載の軟磁性合金粉末を含む、磁心。
- 請求項5に記載の磁心を備える、磁気応用部品。
- 請求項1~4のいずれか1項に記載の軟磁性合金粉末を含む、ノイズ抑制シート。
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