JPWO2008078679A1 - 黒鉛材料及びその製造方法 - Google Patents
黒鉛材料及びその製造方法 Download PDFInfo
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Abstract
Description
比較的高い温度で黒鉛結晶の発達を促す作用を示す第2の添加物としては、以下のものが挙げられる。
上述のように、第1の添加物としては、炭化珪素が最も好ましく、第2の添加物としては、酸化ジルコニウム及び酸化チタニウムが最も好ましい。
(発明の効果)
以下の実施例及び比較例においては、以下に示す第一〜第三段階からなる製造方法により黒鉛材料を製造した。
第一段階:骨材となるニードルコークス粉末100質量部(粒度範囲およそ100μm)、コールタールピッチ10〜70質量部(加熱すれば液状になるもの)を、混捏して結合塊を作製し、これを粉砕した粉砕粉(粒度範囲およそ1000μm)を用意する。
得られた黒鉛材料について、密度、熱膨張係数、熱伝導率、添加元素の残存量、及び結晶構造(面間隔(d112))を、以下のようにして測定した。
表2に示すように、炭化珪素(平均粒径50μm)を5mass%、酸化チタニウム(平均粒径50μm)を10mass%添加し、上記の第一〜第三段階により黒鉛材料を製造した。製造条件及び黒鉛材料の特性を表2に示す。
図3は、実施例3及び実施例4で得られた黒鉛材料のX線回折パターンを示す図である。図3に示すように、実施例3においては、炭化珪素及び炭化ジルコニウムのピークが得られており、実施例4においては、炭化珪素と炭化チタニウムのピークが得られている。このことから、添加物の元素は、炭化物として最終的な黒鉛材料中に残存していることが確認された。
上記実施例の黒鉛材料に、銅、銅合金、アルミニウム、またはアルミニウム合金を含浸させた。アルゴンの不活性ガス雰囲気下で、これらの金属または合金を溶解し、この中に黒鉛材料を浸漬し、加圧することにより、金属または合金を含浸させた。得られた黒鉛金属複合材料は、良好な放熱性を有しており、放熱部材として適したものであった。
Claims (24)
- X線回折による黒鉛結晶の112面の厚みが15nm以上であって、X、Y、及びZ軸の三方向の平均熱伝導率が250W/(m・K)以上であることを特徴とする黒鉛材料。
- 珪素、ジルコニウム、カルシウム、チタニウム、クロム、マンガン、鉄、コバルト、ニッケル、カルシウム、イットリウム、ニオブ、モリブデン、テクネチウム及びルテニウム元素またはその元素を含む化合物から選ばれる少なくとも2種類以上が含まれることを特徴とする請求項1に記載の黒鉛材料。
- 前記元素を含む化合物が、炭化物であることを特徴とする請求項2に記載の黒鉛材料。
- 前記元素を含む化合物が、珪素を含む化合物とジルコニウムを含む化合物であることを特徴とする請求項2または3に記載の黒鉛材料。
- 前記珪素を含む化合物が、炭化珪素であることを特徴とする請求項4に記載の黒鉛材料。
- 前記ジルコニウムを含む化合物が、炭化ジルコニウムであることを特徴とする請求項4または5に記載の黒鉛材料。
- 前記元素を含む化合物が、珪素を含む化合物とチタニウムを含む化合物であることを特徴とする請求項2または3に記載の黒鉛材料。
- 前記珪素を含む化合物が、炭化珪素であることを特徴とする請求項7に記載の黒鉛材料。
- 前記チタニウムを含む化合物が、炭化チタニウムであることを特徴とする請求項7または8に記載の黒鉛材料。
- 前記元素の残存量が、それぞれ0.1mass%以上であることを特徴とする請求項2〜9のいずれか1項に記載の黒鉛材料。
- 請求項1〜10のいずれか1項に記載の黒鉛材料を製造する方法であって、
骨材と粘結材を混合、混捏、粉砕して得た粉砕粉に、珪素、ジルコニア、カルシウム、チタニウム、クロム、マンガン、鉄、コバルト、ニッケル、カルシウム、イットリウム、ニオブ、モリブデン、テクネチウムおよびルテニウム元素またはその元素を含む化合物から選ばれる少なくとも2種類以上を含有させた成形用粉末を調製する工程と、
前記成形用粉末を成形し、熱処理する工程とを備えることを特徴とする黒鉛材料の製造方法。 - 前記元素を含む化合物が、炭化物または酸化物であることを特徴とする請求項11に記載の黒鉛材料の製造方法。
- 前記元素を含む化合物が、珪素を含む化合物とジルコニウムを含む化合物であることを特徴とする請求項11または12に記載の黒鉛材料の製造方法。
- 前記珪素を含む化合物が、炭化珪素であることを特徴とする請求項13に記載の黒鉛材料の製造方法。
- 前記ジルコニウムを含む化合物が、酸化ジルコニウムであることを特徴とする請求項13または14に記載の黒鉛材料の製造方法。
- 前記元素を含む化合物が、珪素を含む化合物とチタニウムを含む化合物であることを特徴とする請求項11または12に記載の黒鉛材料の製造方法。
- 前記珪素を含む化合物が、炭化珪素であることを特徴とする請求項16に記載の黒鉛材料の製造方法。
- 前記チタニウムを含む化合物が、酸化チタニウムであることを特徴とする請求項16または17に記載の黒鉛材料の製造方法。
- さらに高純度処理を施したことを特徴とする請求項1〜10のいずれか1項に記載の黒鉛材料。
- 請求項1〜10及び19のいずれか1項に記載の黒鉛材料に、金属または合金を含浸させたことを特徴とする黒鉛金属複合材料。
- 金属または合金が、銅、銅合金、アルミニウム、またはアルミニウム合金であることを特徴とする請求項20に記載の黒鉛金属複合材料。
- 請求項1〜10及び19のいずれか1項に記載の黒鉛材料、または請求項20もしくは21に記載の黒鉛金属複合材料の表面に金属を被覆したことを特徴とする金属被覆黒鉛材料。
- 請求項1〜10及び19のいずれか1項に記載の黒鉛材料、請求項20もしくは21に記載の黒鉛金属複合材料、または請求項22に記載の金属被覆黒鉛材料を使用したことを特徴とする放熱部材。
- 請求項23に記載の放熱部材を使用した半導体電子機器。
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JP5340069B2 (ja) * | 2008-08-29 | 2013-11-13 | 京セラ株式会社 | 炭素−金属複合体およびこれを用いた回路部材または放熱部材 |
JP5367521B2 (ja) * | 2009-09-18 | 2013-12-11 | Jx日鉱日石エネルギー株式会社 | リチウム二次電池の負極用炭素材料及びその製造方法 |
US20110286876A1 (en) * | 2010-05-24 | 2011-11-24 | Applied Nanotech Holdings, Inc. | Thermal management composite materials |
DE102010038669A1 (de) * | 2010-07-29 | 2012-02-02 | Sgl Carbon Se | Kathodenblock für eine Aluminium-Elektrolysezelle und ein Verfahren zu seiner Herstellung |
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CN109207786B (zh) * | 2018-11-01 | 2020-08-07 | 西北工业大学 | Zr3Al3C5-ZrAlxSiy复合材料制备方法 |
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