JP2019054022A - 近傍界用ノイズ抑制シート - Google Patents
近傍界用ノイズ抑制シート Download PDFInfo
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- 229910045601 alloy Inorganic materials 0.000 claims abstract description 128
- 239000000956 alloy Substances 0.000 claims abstract description 128
- 239000003063 flame retardant Substances 0.000 claims abstract description 60
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 57
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- 239000006087 Silane Coupling Agent Substances 0.000 description 1
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- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 description 1
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- 229910052720 vanadium Inorganic materials 0.000 description 1
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- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
- H05K9/0083—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising electro-conductive non-fibrous particles embedded in an electrically insulating supporting structure, e.g. powder, flakes, whiskers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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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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- H01F1/12—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
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- Mechanical Engineering (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
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- Soft Magnetic Materials (AREA)
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
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Abstract
Description
(1)有機物からなる基材と、前記基材中に担持された偏平状の合金粉末と、前記基材中に分散した難燃剤と、を含む近傍界用ノイズ抑制シートであって、
前記合金粉末は、原子%で、組成式:Fe100-X1-Y1(Si,P,C)X1CuY1(但し、16≦X1+Y1≦24、14.5≦X1≦24、及び0≦Y1≦1.5)で表わされる合金粉末および/または組成式:Fe100-X2-Y2(Si,B,C)X2CuY2(但し、16≦X2+Y2≦24、14.5≦X2≦24、及び0≦Y2≦1.5)で表わされる合金粉末であって、前記合金粉末の相構造は、非晶質相のみからなり、又は非晶質相とα-Feを主体とした結晶相とが混在する相からなり、
前記難燃剤の平均粒径が10μm以下であり、
さらに、密度が2.5g/cm3以上であることを特徴とする近傍界用ノイズ抑制シート。
水アトマイズ法により、原料粉末として、表1に示す組成の合金粉末を得た。ここで、表1に示す合金粉末中のSi,P,Cの比率は、いずれも13:63:24とした。また、原料粉末の平均粒径は40〜50μmとした。次に、それぞれの合金粉末をアトライタにて偏平加工し、偏平状の合金粉末を得た。既述の方法によって測定した偏平状の合金粉末の厚さ及びアスペクト比の平均値を表1に示す。次に、合金粉末の表面に自己酸化被膜を形成するために、大気中にて100℃、1時間の酸化処理を行った後に、アルゴン中で350〜450℃、30分間の焼鈍処理を行った。表1には、焼鈍処理後の各偏平状の合金粉末に対して、粉末X線回折法により測定した相構造と保磁力測定器で測定した保磁力を示す。
水アトマイズ法により、原料粉末として、表2に示す組成の合金粉末を得た。ここで、表2に示す合金粉末中のSi,B,Cの比率は、いずれも13:63:24とした。また、原料粉末の平均粒径は40〜50μmとした。次に、それぞれの合金粉末をアトライタにて偏平加工し、偏平状の合金粉末を得た。既述の方法によって測定した偏平状の合金粉末の厚さ及びアスペクト比の平均値を表2に示す。次に、シランカップリング剤として3-アミノプロピルトリエトキシシランが2質量%添加されているエタノール溶液中に合金粉末を投入し、30分間の攪拌を行った。その後、粉末を溶液中から取り出し、大気中で150℃、8時間の条件で乾燥させた。その後、窒素中で350〜450℃、30分間の焼鈍処理を行った。表2には、既述の方法によって測定した相構造と保磁力を示す。
水アトマイズ法により、原料粉末として、表3に示す組成の合金粉末を得た。ここで、表3に示す合金粉末中のSi,B,C及びSi,P,Cの比率は、いずれも9:65:26とし、各発明例25〜27における2種類の合金粉末の混合比は1:1とした。また、原料粉末の平均粒径は40〜50μmとした。次に、それぞれの合金粉末をアトライタにて偏平加工し、偏平状の合金粉末を得た。既述の方法によって測定した偏平状の合金粉末の厚さ及びアスペクト比の平均値を表3に示す。次に、合金粉末の表面に自己酸化被膜を形成するために、大気中にて100℃、1時間の酸化処理を行った後に、アルゴン中で350〜450℃、30分間の焼鈍処理を行った。表3には、既述の方法によって測定した相構造と保磁力測定器で測定した保磁力を示す。
水アトマイズ法により、原料粉末として、表4に示す組成の合金粉末を得た。ここで、表4に示す合金粉末中のSi,B,C及びSi,P,Cの比率は、いずれも9:65:26とした。また、原料粉末の平均粒径は40〜50μmとした。次に、それぞれの合金粉末をアトライタにて偏平加工し、偏平状の合金粉末を得た。既述の方法によって測定した偏平状の合金粉末の厚さ及びアスペクト比の平均値を表4に示す。次に、チタン系のカップリング剤としてテトラノルマルブチルチタネートを2質量%添加したエタノール溶液中に合金粉末を投入し、30分間の攪拌を行った。その後、合金粉末を溶液中から取り出し、大気中で150℃、8時間の条件で乾燥させ、合金粉末の表面に、平均粒径が100nm以下の酸化物を形成した。その後、窒素中で350〜450℃、30分間の焼鈍処理を行った。表4には、既述の方法によって測定した相構造と保磁力を示す。
Claims (11)
- 有機物からなる基材と、前記基材中に担持された偏平状の合金粉末と、前記基材中に分散した難燃剤と、を含む近傍界用ノイズ抑制シートであって、
前記合金粉末は、原子%で、組成式:Fe100-X1-Y1(Si,P,C)X1CuY1(但し、16≦X1+Y1≦24、14.5≦X1≦24、及び0≦Y1≦1.5)で表わされる合金粉末および/または組成式:Fe100-X2-Y2(Si,B,C)X2CuY2(但し、16≦X2+Y2≦24、14.5≦X2≦24、及び0≦Y2≦1.5)で表わされる合金粉末であって、前記合金粉末の相構造は、非晶質相のみからなり、又は非晶質相とα-Feを主体とした結晶相とが混在する相からなり、
前記難燃剤の平均粒径が10μm以下であり、
さらに、密度が2.5g/cm3以上であることを特徴とする近傍界用ノイズ抑制シート。 - 前記合金粉末は、19≦X1+Y1≦21、18≦X1≦21、及び0≦Y1≦1.0、および/または、19≦X2+Y2≦21、18≦X2≦21、及び0≦Y2≦1.0を満たす、請求項1に記載の近傍界用ノイズ抑制シート。
- 前記近傍界用ノイズ抑制シートのμ”分散の立ち上がりにおいて、μ”値が1以上となる周波数が1MHz以上10MHz以下であり、かつ10GHzでのμ”値が2以上である、請求項1又は2に記載の近傍界用ノイズ抑制シート。
- 前記合金粉末の保磁力が0.5A/cm以上8A/cm以下である、請求項1〜3のいずれか一項に記載の近傍界用ノイズ抑制シート。
- 前記難燃剤は、水酸化アルミニウム、水酸化マグネシウム、ホウ酸亜鉛、メラミンシアネレート、及び赤リンのうちから選択される1種以上の非ハロゲン系難燃剤である、請求項1〜4のいずれか一項に記載の近傍界用ノイズ抑制シート。
- 前記合金粉末において、前記Feの3原子%以下が、Al、Co、Ni、Cr、Nb、Mo、Ta、及びWのうちから選択される1種以上の元素で置換された、請求項1〜5のいずれか一項に記載の近傍界用ノイズ抑制シート。
- 前記合金粉末のアスペクト比の平均値が10以上100以下である、請求項1〜6のいずれか一項に記載の近傍界用ノイズ抑制シート。
- 前記合金粉末の厚さの平均値が0.1μm以上1.5μm以下である、請求項1〜7のいずれか一項に記載の近傍界用ノイズ抑制シート。
- 前記近傍界用ノイズ抑制シートの表面抵抗が105Ω/□以上である、請求項1〜8のいずれか一項に記載の近傍界用ノイズ抑制シート。
- 前記基材はハロゲン元素を含まない、請求項1〜9のいずれか一項に記載の近傍界用ノイズ抑制シート。
- 前記ノイズ抑制シートは、シリコン系、チタン系、アルミニウム系およびジルコニウム系のうちから選択される1種以上の酸化物を含み、前記酸化物の粒径が100nm以下である、請求項1〜10のいずれか一項に記載の近傍界用ノイズ抑制シート。
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