JP2020536152A - 複合材 - Google Patents
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Abstract
Description
異方性熱伝導性フィラーとしては、繊維形態であり、縦横比が約40程度であり、長さ方向に垂直な方向への断面の平均粒径が約10μm程度である窒化ホウ素を使用し、磁性体としては、平均粒径が約100nm〜200nmの水準である酸化鉄(Fe2O3)粒子を使用して複合フィラーを形成した。前記酸化鉄粒子を常温で塩酸溶液に浸漬させて表面の反応基を活性化させた。次に、前記表面反応基が活性化した酸化鉄粒子と前記窒化ホウ素を10:6の重量比(窒化ホウ素:酸化鉄)で水溶液に分散させ、120Wの超音波で約1時間の間処理した後、洗浄および乾燥して、複合フィラーを製造した。図1は、前記製造された複合フィラーの写真である。
高分子マトリックスの硬化性前駆体としては、熱硬化性シリコン組成物(ダウコーニング社、Sylgard184)を使用した。前記硬化性前駆体と、前記製造例1で製造した複合フィラー(第1フィラー)および異方性熱伝導性フィラー(第2フィラー)として、繊維形態であり、縦横比が約40程度であり、長さ方向に垂直な方向への断面の平均粒径が約10μm程度である窒化ホウ素を混合して、混合物を製造した。前記混合物に適用された硬化性前駆体、第1および第2フィラーの密度と適用重量で計算した体積比率は、約50:10:40(=硬化性前駆体:第1フィラー:第2フィラー)程度であった。製造された混合物をフィルム形状のテフロン(登録商標)モールド(厚さ:約1mm)に注いで、フィルム形態の上部および下部方向にネオジウム磁石で磁場を約700〜800Gaussの強度で印加しながら、約120℃の温度で30分間程度硬化させて、フィルム形態の複合材を形成した。図2は、上記のように形成された複合材の断面写真である。図面に示されたように、複合フィラーが垂直方向(磁場方向、厚さ方向)に配向して熱伝達経路を形成しながら、略水平方向に配向された窒化ホウ素フィラーが前記熱伝達経路を連結するネットワークが形成されている。このような複合材のZ軸方向(厚さ方向)の熱伝導度は、約5.8W/mK程度であった。
第2フィラー、すなわち磁性体と複合化されないフィラーを適用せず、硬化性前駆体と製造例1の第1フィラーの体積比率が1:1になるようにして混合物を製造したことを除いて、実施例1と同一に複合材を製造した。このように製造された複合材のZ軸方向(厚さ方向)の熱伝導度は、約2.5W/mK程度であった。
硬化性前駆体、第1および第2フィラーの密度と適用重量で計算した体積比率が約50:40:10(=硬化性前駆体:第1フィラー:第2フィラー)程度になるように混合物を製造したことを除いて、実施例1と同一に複合材を製造した。図4は、前記製作された複合材の表面写真であり、図面に示されたように、大きい欠陥が確認された。
第1フィラー、すなわち磁性体と複合化されたフィラーを適用せず、硬化性前駆体と第2フィラーの体積比率が3:7程度になるように混合物を製造したことを除いて、実施例1と同一に複合材を製造した。このように製造された複合材のZ軸方向(厚さ方向)の熱伝導度は、約2.4W/mK程度であった。
Claims (12)
- 高分子マトリックスおよび熱伝導体を含む複合材であって、
前記熱伝導体は、磁性体と複合化された第1異方性熱伝導性フィラーと、磁性体と複合化されない第2異方性熱伝導性フィラーとを含み、
前記複合材内の前記熱伝導体の体積比率は、60体積%以下であり、
前記第1異方性熱伝導性フィラーの体積比率V1と前記第2異方性熱伝導性フィラーの体積比率V2との比V1/V2が、3以下である複合材。 - 第1異方性熱伝導性フィラーが配向されて熱伝達経路を形成しており、第2異方性熱伝導性フィラーが前記熱伝達経路を連結している、請求項1に記載の複合材。
- 複合材は、フィルム形態であり、第1異方性熱伝導性フィラーが前記フィルム形態の厚さ方向に配向されて熱伝達経路を形成している、請求項2に記載の複合材。
- 複合材は、フィルム形態であり、前記フィルム形態の厚さ方向に沿って測定された熱伝導度が0.3W/mK以上である、請求項1から3のいずれか一項に記載の複合材。
- フィルム形態の厚さが10μm以上である、請求項3または4に記載の複合材。
- 高分子マトリックスは、アクリル樹脂、シリコン樹脂、エポキシ樹脂、ウレタン樹脂、アミノ樹脂、ポリエステル、オレフィン樹脂およびフェノール樹脂よりなる群から選ばれる一つ以上を含む、請求項1から5のいずれか一項に記載の複合材。
- 異方性熱伝導性フィラーは、アルミナ、窒化アルミニウム(AlN)、窒化ホウ素(BN)、窒化ケイ素(silicon nitride)、SiC、BeO、カーボンブラック、グラフェン、グラフェン酸化物、カーボンナノチューブまたはグラファイトである、請求項1から6のいずれか一項に記載の複合材。
- 異方性熱伝導性フィラーは、縦横比が5以上である、請求項1から7のいずれか一項に記載の複合材。
- 異方性熱伝導性フィラーの断面の平均粒径が、1μm〜100μmの範囲内である、請求項8に記載の複合材。
- 磁性体は、酸化鉄、フェライトまたは合金ナノ粒子である、請求項1から9のいずれか一項に記載の複合材。
- 磁性体は、平均粒径が10nm〜1,000μmの範囲内である、請求項1から10のいずれか一項に記載の複合材。
- 高分子マトリックスの硬化性前駆体と、磁性体と複合化された第1異方性熱伝導性フィラーと、磁性体と複合化されていない第2異方性熱伝導性フィラーとを含む混合物に磁場を印加して、前記磁性体と複合化された第1異方性熱伝導性フィラーを配向させた状態で、前記硬化性前駆体を硬化させて、高分子マトリックスを形成する段階を含む請求項1に記載の複合材の製造方法。
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Application Number | Priority Date | Filing Date | Title |
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KR10-2017-0141254 | 2017-10-27 | ||
KR1020170141254A KR20190047398A (ko) | 2017-10-27 | 2017-10-27 | 복합재 |
PCT/KR2018/012781 WO2019083311A1 (ko) | 2017-10-27 | 2018-10-26 | 복합재 |
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JP2020536152A true JP2020536152A (ja) | 2020-12-10 |
JP7034534B2 JP7034534B2 (ja) | 2022-03-14 |
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JP2020519091A Active JP7034534B2 (ja) | 2017-10-27 | 2018-10-26 | 複合材 |
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US (1) | US20200263070A1 (ja) |
EP (1) | EP3702399B1 (ja) |
JP (1) | JP7034534B2 (ja) |
KR (2) | KR20190047398A (ja) |
CN (1) | CN111133039B (ja) |
WO (1) | WO2019083311A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2022176854A1 (ja) * | 2021-02-18 | 2022-08-25 | デクセリアルズ株式会社 | 熱伝導性シートの製造方法及び熱伝導性シート |
Citations (7)
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JP2002121404A (ja) * | 2000-10-19 | 2002-04-23 | Polymatech Co Ltd | 熱伝導性高分子シート |
JP2004315761A (ja) * | 2003-04-21 | 2004-11-11 | Hitachi Metals Ltd | 放熱体 |
JP2012169599A (ja) * | 2011-01-28 | 2012-09-06 | Nitto Denko Corp | 熱伝導性フィルム及びその製造方法 |
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US20200263070A1 (en) | 2020-08-20 |
KR102479099B1 (ko) | 2022-12-19 |
CN111133039A (zh) | 2020-05-08 |
KR20190047398A (ko) | 2019-05-08 |
EP3702399A4 (en) | 2020-10-07 |
EP3702399A1 (en) | 2020-09-02 |
JP7034534B2 (ja) | 2022-03-14 |
CN111133039B (zh) | 2023-08-04 |
EP3702399B1 (en) | 2024-04-03 |
KR20220014894A (ko) | 2022-02-07 |
WO2019083311A1 (ko) | 2019-05-02 |
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