JP2017132650A - Highly heat-conductive anisotropic graphite material and production method thereof - Google Patents
Highly heat-conductive anisotropic graphite material and production method thereof Download PDFInfo
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本発明は、優れた熱伝導率を有する高熱伝導異方性黒鉛材料およびその製造方法に関する。 The present invention relates to a highly heat-conductive anisotropic graphite material having excellent heat conductivity and a method for producing the same.
従来、優れた熱伝導率を有す材料としては、石炭ピッチ系モザイクコークスにバインダーを添加し混捏、再粉砕、成形、焼成、含浸、再焼成、黒鉛化を実施して製造されていた（例えば特開２００９−７８９６７号公報）。 Conventionally, as a material having excellent thermal conductivity, a binder is added to coal pitch mosaic coke and kneaded, reground, molded, fired, impregnated, refired, and graphitized (for example, JP 2009-78967 A).
他方、黒鉛をシート状に形成した黒鉛シートは、黒鉛が薄片状であるため、製造工程における圧延時に層状構造となり、面方向の熱伝導率が高くなる一方、厚さ方向の熱伝導率は相対的に著しく低くなる特性があった。また、黒鉛シートは厚みの変化により電気比抵抗が変化するものであった。 On the other hand, a graphite sheet in which graphite is formed into a sheet shape has a lamellar structure during rolling in the manufacturing process because the graphite is flaky, and the thermal conductivity in the surface direction is high, while the thermal conductivity in the thickness direction is relatively There was a characteristic that it was extremely low. In addition, the specific resistance of the graphite sheet was changed by changing the thickness.
本願発明者は、上記のような性質を有する黒鉛シートを用いて異方性の高熱伝導黒鉛材料を製造することを想起したものであり、すなわち、本発明の課題は、黒鉛シートに比して面方向と厚さ方向の熱伝導率の差が小さく、厚みの変化によっても電気比抵抗が略一定の新規な特性を有する高熱伝導異方性黒鉛材料およびその製造方法を提供することにある。 The inventor of the present application has conceived that an anisotropic high thermal conductive graphite material is produced using a graphite sheet having the above-described properties, that is, the problem of the present invention is compared with the graphite sheet. An object of the present invention is to provide a highly heat-conductive anisotropic graphite material having a novel characteristic in which the difference in thermal conductivity between the surface direction and the thickness direction is small and the electrical resistivity is substantially constant even when the thickness changes, and a method for producing the same.
上記課題を解決するものは、厚み方向の熱伝導率をａＷ／ｍＫ、面方向の熱伝導率をｂＷ／ｍＫとすると、１３≦ｂ／ａ≦５０であることを特徴とする高熱伝導異方性黒鉛材料である（請求項１）。
また、上記課題を解決するものは、黒鉛シートを粉砕して粉砕粉を形成する粉砕粉形成工程と、前記粉砕粉を用いて成形品を成形する成形工程とを有することを特徴とする高熱伝導異方性黒鉛材料の製造方法である（請求項２）。前記成形工程の後に前記成形物が焼成されていないことが好ましい（請求項３）。
What solves the above-mentioned problems is a high thermal conductivity anisotropic, wherein 13 ≦ b / a ≦ 50, where aW / mK in the thickness direction and bW / mK in the surface direction. (Claim 1).
Moreover, what solves the said subject has the pulverized powder formation process which grind | pulverizes a graphite sheet and forms pulverized powder, and the shaping | molding process which shape | molds a molded article using the said pulverized powder, The high heat conductivity characterized by the above-mentioned A method for producing an anisotropic graphite material (claim 2). It is preferable that the molded product is not fired after the molding step.
請求項１に記載した高熱伝導異方性黒鉛材料によれば、従来の黒鉛シートに比して面方向と厚さ方向の熱伝導率の差が小さく、厚みの変化によっても電気比抵抗が略一定の新規な特性を有する高熱伝導異方性黒鉛材料となる。
請求項２に記載した高熱伝導異方性黒鉛材料の製造方法によれば、従来の黒鉛シートに比して面方向と厚さ方向の熱伝導率の差が小さく、厚みの変化によっても電気比抵抗が略一定の新規な特性を有する高熱伝導異方性黒鉛材料を作製できる。
請求項３に記載した高熱伝導異方性黒鉛材料の製造方法によれば、成形品が焼成されていないため、より熱伝導率が高い高熱伝導異方性黒鉛材料を作製できることに加え、焼成工程がないため、より短時間で低廉に高熱伝導異方性黒鉛材料を作製できる。
According to the highly heat-conductive anisotropic graphite material according to
According to the method for producing a highly heat-conductive anisotropic graphite material according to claim 2, the difference in thermal conductivity between the plane direction and the thickness direction is smaller than that of a conventional graphite sheet, and the electrical ratio is also affected by a change in thickness. A highly heat-conductive anisotropic graphite material having a novel characteristic with a substantially constant resistance can be produced.
According to the method for producing a highly heat-conductive anisotropic graphite material according to claim 3, since the molded product is not fired, in addition to being able to produce a highly heat-conductive anisotropic graphite material having higher heat conductivity, a firing step Therefore, a highly heat-conductive anisotropic graphite material can be produced in a shorter time and at a lower cost.
本発明では、黒鉛シートを粉砕して粉砕粉を形成する粉砕粉形成工程と、粉砕粉にて成形品を成形する成形工程とを有することにより、黒鉛シートに比して面方向と厚さ方向の熱伝導率の差が小さく、厚みの変化によっても電気比抵抗が略一定の新規な特性を有する黒鉛シート粉砕成形品を作製できる高熱伝導異方性黒鉛材料およびその製造方法を実現した。 In the present invention, by having a pulverized powder forming step of pulverizing a graphite sheet to form a pulverized powder and a forming step of forming a molded product with the pulverized powder, the surface direction and the thickness direction are compared with those of the graphite sheet. Thus, a highly thermally conductive anisotropic graphite material capable of producing a graphite sheet pulverized molded article having a novel characteristic in which the difference in thermal conductivity is small and the electrical resistivity is substantially constant even when the thickness changes is realized.
本発明の高熱伝導異方性黒鉛材料の製造方法について説明する。
図１に示した高熱伝導異方性黒鉛材料１の製造方法は、黒鉛シートを粉砕して粉砕粉を形成する粉砕粉形成工程と、前記粉砕粉にて成形品を成形する成形工程とを有し、前記成形工程の後に前記成形物が焼成されていないことを特徴とする高熱伝導異方性黒鉛材料の製造方法である。以下、各工程について順次詳述する。
The manufacturing method of the highly heat-conductive anisotropic graphite material of this invention is demonstrated.
1 has a pulverized powder forming step of pulverizing a graphite sheet to form a pulverized powder, and a forming step of forming a molded product with the pulverized powder. And the said molded object is not baked after the said formation process, It is a manufacturing method of the highly heat conductive anisotropic graphite material characterized by the above-mentioned. Hereinafter, each step will be described in detail.
粉砕粉形成工程では、黒鉛シートを粉砕機にて粉砕し粉砕粉を形成する。
黒鉛シートは、酸処理した酸処理黒鉛原料に熱を加えて黒鉛結晶の層間を数百倍に膨張させた膨張黒鉛を形成し、この膨張黒鉛の黒鉛間に発生している分子間力を利用してロール圧延により分子間力で結合させたものである。この粉砕粉形成工程では、前記のように形成された黒鉛シートを粉砕して粉砕粉を形成する。
In the pulverized powder forming step, the graphite sheet is pulverized by a pulverizer to form pulverized powder.
The graphite sheet forms expanded graphite that is expanded several hundred times between the graphite crystal layers by applying heat to the acid-treated acid-treated graphite material, and uses the intermolecular force generated between the expanded graphite graphite. Then, they are bonded by intermolecular force by roll rolling. In this pulverized powder forming step, the graphite sheet formed as described above is pulverized to form pulverized powder.
成形工程では、黒鉛シートの粉砕粉を、例えばメカニカルプレス（油圧プレス、フリクションプレス、振動プレス、CIP＝Cold Isostatic Press）にて加圧成形することにより成形品を成形する。図１に示した本発明の高熱伝導異方性黒鉛材料の製造方法にて作製した高熱伝導異方性黒鉛材料１は、長方体ブロック形状（板状体または平板）に成形されているが、これに限定されるものではなく、様々な用途に応じてどのような形態に成形されていてもよく、例えば、円筒形状、坩堝形状などに成形してもよい。
In the forming step, the pulverized powder of the graphite sheet is formed by pressure molding using, for example, a mechanical press (hydraulic press, friction press, vibration press, CIP = Cold Isostatic Press). The highly heat-conductive
なお、この高熱伝導異方性黒鉛材料の製造方法では、成形工程の後に成形物が焼成されていない。これは、黒鉛シートを形成した膨張黒鉛の黒鉛間に発生している分子間力にて成形工程のみで高熱伝導異方性黒鉛材料が作製できるからである。従って、焼成を行う必要がないことから、成形工程においてバインダーとして樹脂もしくはタール及びピッチが添加される必要もない。このように、この実施例の高熱伝導異方性黒鉛材料の製造方法にて作製された高熱伝導異方性黒鉛材料は、成形後の焼成がされていないことから、焼成によって熱伝導率が低下することもなく、より高い熱伝導率を有するものとなる。 In this method for producing a high thermal conductivity anisotropic graphite material, the molded product is not fired after the molding step. This is because a highly heat-conductive anisotropic graphite material can be produced only by a molding process by an intermolecular force generated between graphites of expanded graphite forming a graphite sheet. Therefore, since it is not necessary to perform firing, it is not necessary to add resin or tar and pitch as a binder in the molding step. Thus, since the high thermal conductivity anisotropic graphite material produced by the method for producing the high thermal conductivity anisotropic graphite material of this example is not fired after molding, the thermal conductivity is reduced by firing. Without having a higher thermal conductivity.
（物性値測定）
本発明の高熱伝導異方性黒鉛材料の製造方法にて作製した高熱伝導異方性黒鉛材料１の物性値（かさ比重、気孔率、曲げ強度、シェアー硬度、固有抵抗、熱伝導率）を測定し、以下の表１の結果を得た。
(Physical property measurement)
Measure physical properties (bulk specific gravity, porosity, bending strength, shear hardness, specific resistance, thermal conductivity) of the high thermal conductivity
（考察１）熱伝導率について
本発明の高熱伝導異方性黒鉛材料の製造方法で、成形工程をＣＩＰ成形で行い、バインダーの添加無し、焼成無しの高熱伝導異方性黒鉛材料１の熱伝導率は、面方向（図１のｂ方向）で２００Ｗ/ｍＫであった（表１の実施例１参照）。
本発明の高熱伝導異方性黒鉛材料の製造方法で、成形工程を油圧成形で行い、バインダーの添加無し、焼成無しの高熱伝導異方性黒鉛材料の熱伝導率は、面方向（図１のｂ方向）で２５２Ｗ/ｍＫであった（表１の実施例２参照）。
他方、黒鉛方向性が等方性で、コークス、人造黒鉛などを使用原料とし、成形工程をＣＩＰ成形で行い、バインダーを添加し、焼成工程を行った市販品１の熱伝導率は８０Ｗ/ｍＫであった。
さらに、黒鉛方向性が等方性で、コークス、人造黒鉛などを使用原料とし、成形工程を押し出し成形で行い、バインダーを添加し、焼成工程を行った市販品２の熱伝導率は１２０Ｗ/ｍＫであった。
なお、熱伝導率の測定はレーザーフラッシュ法にて行い、得られた値からそれぞれの熱伝導率をそれぞれ算出した。
上記結果から、バインダーの添加無し、焼成無しの高熱伝導異方性黒鉛材料（実施例１または実施例２）の方が、バインダーを添加し焼成工程を行った市販品１または市販品２に比して、高い熱伝導率を示すことが確認された。
(Consideration 1) Thermal conductivity In the method for producing a high thermal conductivity anisotropic graphite material of the present invention, the molding step is performed by CIP molding, and the thermal conductivity of the high thermal conductivity
In the method for producing a high thermal conductivity anisotropic graphite material of the present invention, the molding step is performed by hydraulic molding, and the thermal conductivity of the high thermal conductivity anisotropic graphite material without addition of binder and without firing is in the plane direction (of FIG. 1). b direction) was 252 W / mK (see Example 2 in Table 1).
On the other hand, the thermal conductivity of the
Furthermore, the thermal conductivity of the commercial product 2 which has isotropic graphite orientation, uses coke, artificial graphite and the like as raw materials, performs the molding process by extrusion molding, adds a binder, and performs the firing process is 120 W / mK. Met.
The thermal conductivity was measured by a laser flash method, and each thermal conductivity was calculated from the obtained value.
From the above results, the highly heat-conductive anisotropic graphite material (Example 1 or Example 2) without addition of a binder and without firing is compared to the
（考察２）強度について
本発明の高熱伝導異方性黒鉛材料の製造方法で、成形工程をＣＩＰ成形で行い、バインダーの添加無し、焼成無しの高熱伝導異方性黒鉛材料の曲げ強度は１０Ｍｐａ、ショアー硬度は３３であった（表１の実施例１参照）。
本発明の高熱伝導異方性黒鉛材料の製造方法で、成形工程を油圧成形で行い、バインダーの添加無し、焼成無しの高熱伝導異方性黒鉛材料の曲げ強度は１６Ｍｐａ、ショアー硬度は３４であった（表１の実施例２参照）。
他方、黒鉛方向性が等方性で、コークス、人造黒鉛などを使用原料とし、成形工程をＣＩＰ成形で行い、バインダーを添加し、焼成工程を行った市販品１の曲げ強度は４０Ｍｐａ、ショアー硬度は５０であった。
さらに、他方、黒鉛方向性が等方性で、コークス、人造黒鉛などを使用原料とし、成形工程を押し出し成形で行い、バインダーを添加し、焼成工程を行った市販品２の曲げ強度は２５Ｍｐａ、ショアー硬度は３７であった。
上記結果から、バインダーの添加無し、焼成無しの高熱伝導異方性黒鉛材料の方（実施例１または実施例２）が、バインダーを添加し焼成工程を行った市販品１または２に比して、強度は低いが、本発明により、焼成工程を行わない場合でも十分な強度を有する高熱伝導異方性黒鉛材料を作製できることが確認された。
(Consideration 2) Strength In the method for producing a high thermal conductivity anisotropic graphite material of the present invention, the molding step is performed by CIP molding, and the bending strength of the high thermal conductivity anisotropic graphite material without addition of binder and without firing is 10 Mpa, The Shore hardness was 33 (see Example 1 in Table 1).
In the method for producing a highly heat-conductive anisotropic graphite material of the present invention, the forming step is performed by hydraulic forming. The bending strength of the high heat-conductive anisotropic graphite material without addition of a binder and without firing is 16 Mpa and the Shore hardness is 34. (See Example 2 in Table 1).
On the other hand, the graphite product is isotropic, coke, artificial graphite, etc. are used as raw materials, the molding process is performed by CIP molding, the binder is added, and the firing process is performed. The bending strength of the
On the other hand, the graphite directionality is isotropic, coke, artificial graphite and the like are used as raw materials, the molding process is performed by extrusion molding, the binder is added, and the bending strength of the commercial product 2 subjected to the firing process is 25 Mpa, The Shore hardness was 37.
From the above results, the high thermal conductivity anisotropic graphite material without addition of binder and without firing (Example 1 or Example 2) is compared to the
（試験１）
本発明の高熱伝導異方性黒鉛材料の製造方法にて作製された高熱伝導異方性黒鉛材料と黒鉛シートとの熱伝導率の対比試験を行った。
本発明の高熱伝導異方性黒鉛材料の製造方法にて作製された高熱伝導異方性黒鉛材料として、油圧成形にてブロック形状に成形し、バインダーの添加無し、焼成工程無しで厚みが３．９，５．６，１８．８，２０．８ｍｍの高熱伝導異方性黒鉛材料をそれぞれ作製した（表２参照）。
他方、比較例として、高熱拡散タイプの黒鉛シートで厚みが、０．０８、０．１２、０．２５ｍｍのもの、汎用タイプの黒鉛シートで厚みが、０．１２、０．３ｍｍのものを用いた。
なお、高熱拡散タイプの黒鉛シートは、ロール圧延でかさ比重を１．４〜１．８ｇ/ｃｍ3に調整された黒鉛シートであり、汎用タイプの黒鉛シートはロール圧延でかさ比重を１．０〜１．４ｇ/ｃｍ3に調整された黒鉛シートである。
また、熱伝導率の測定はレーザーフラッシュ法にて行い、得られた値から厚み方向の熱伝導率ａと、面方向の熱伝導率ｂ（図１参照）をそれぞれ算出し、以下の表２の結果を得た。
(Test 1)
A comparative test of the thermal conductivity of the high thermal conductivity anisotropic graphite material produced by the method for producing the high thermal conductivity anisotropic graphite material of the present invention and the graphite sheet was performed.
As the highly heat-conductive anisotropic graphite material produced by the method for producing a highly heat-conductive anisotropic graphite material of the present invention, it is formed into a block shape by hydraulic forming and has a thickness of 3 without the addition of a binder and without a firing step. High thermal conductivity anisotropic graphite materials of 9, 5.6, 18.8, and 20.8 mm were respectively produced (see Table 2).
On the other hand, as a comparative example, a high thermal diffusion type graphite sheet having a thickness of 0.08, 0.12, 0.25 mm and a general-purpose type graphite sheet having a thickness of 0.12, 0.3 mm are used. It was.
The high thermal diffusion type graphite sheet is a graphite sheet having a bulk specific gravity adjusted to 1.4 to 1.8 g / cm 3 by roll rolling, and the general-purpose type graphite sheet has a bulk specific gravity of 1.0 to 1 by roll rolling. A graphite sheet adjusted to 4 g / cm 3 .
Further, the thermal conductivity is measured by a laser flash method, and the thermal conductivity a in the thickness direction and the thermal conductivity b in the plane direction (see FIG. 1) are calculated from the obtained values. The result was obtained.
上記表２から、本発明の高熱伝導異方性黒鉛材料の製造方法にて作製された本発明の高熱伝導異方性黒鉛材料のｂ/ａは１３〜５０であるのに対して、比較例のｂ/ａは１５４〜４１８の値を示した。
これらの結果より、本発明の高熱伝導異方性黒鉛材料の製造方法にて作製された高熱伝導異方性黒鉛材料は、黒鉛シート（他の異方性黒鉛材料）に比して面方向と厚さ方向の熱伝導率の差が著しく小さいことが確認された。
From Table 2 above, the b / a of the highly heat-conductive anisotropic graphite material of the present invention produced by the method for manufacturing the highly heat-conductive anisotropic graphite material of the present invention is 13 to 50, whereas the comparative example is B / a of 154 to 418 was shown.
From these results, the highly heat-conductive anisotropic graphite material produced by the method for producing a highly heat-conductive anisotropic graphite material of the present invention has a plane direction as compared with the graphite sheet (other anisotropic graphite material). It was confirmed that the difference in thermal conductivity in the thickness direction was extremely small.
このように、本発明の製造方法にて作製された高熱伝導異方性黒鉛材料は、従来の異方性黒鉛材料である黒鉛シートに比して厚さ方向の熱伝導率が高く、厚さ方向への熱拡散性が高いものである。
携帯電話やノートパソコンの小型化に伴い、熱対策及び電磁波対策が非常に重要になってきているところ、現在は設計技術や電子部品の低電力化技術により抑えられているが、今後も小型化及び高性能化を進むにあたり、面方向だけでなく厚み方向にも熱伝導率が高い材料が求められると考えられる。
本発明の高熱伝導異方性黒鉛材料は色々な形状や厚みに成形できることから、現在の熱対策及び電磁波対策品より優れた代替品として、例えばヒートシンク（放熱板）、ヒートスプレッダ（緩衝板）として好適に使用できるものと考えられる。
Thus, the high thermal conductivity anisotropic graphite material produced by the production method of the present invention has a higher thermal conductivity in the thickness direction than the conventional anisotropic graphite material, ie, the thickness direction. High thermal diffusivity in the direction.
With the downsizing of mobile phones and notebook computers, countermeasures against heat and electromagnetic waves have become very important, but now they are being suppressed by design technologies and low-power technologies for electronic components. As the performance increases, it is considered that a material having high thermal conductivity is required not only in the plane direction but also in the thickness direction.
Since the highly heat-conductive anisotropic graphite material of the present invention can be formed into various shapes and thicknesses, it is suitable as a heat sink (heat radiating plate), heat spreader (buffer plate), for example, as an alternative superior to current heat countermeasure and electromagnetic wave countermeasure products. It is thought that it can be used for.
（試験２）
本発明の高熱伝導異方性黒鉛材料の製造方法にて作製された高熱伝導異方性黒鉛材料と黒鉛シートとの電気比抵抗の対比試験を行った。
本発明の高熱伝導異方性黒鉛材料の製造方法にて作製された高熱伝導異方性黒鉛材料として、厚みが３．９、５．６、２０．８１ｍｍのものを作製した。他方、比較例として、高熱拡散タイプの黒鉛シートで、厚みが０．０８、０．１２、０．２５ｍｍのもの、汎用タイプの黒鉛シートで、厚みが０．１２、０．３ｍｍのものを用いた。
各実施例および各比較例に対して、それぞれ室温にて四端子法を行い、電気比抵抗として以下の表３の試験結果を得た。
(Test 2)
A comparison test of the electrical resistivity between the high thermal conductivity anisotropic graphite material produced by the method for producing the high thermal conductivity anisotropic graphite material of the present invention and the graphite sheet was performed.
Thicknesses of 3.9, 5.6, and 20.81 mm were produced as the high thermal conductivity anisotropic graphite material produced by the method for producing the high thermal conductivity anisotropic graphite material of the present invention. On the other hand, as a comparative example, a high thermal diffusion type graphite sheet having a thickness of 0.08, 0.12, and 0.25 mm and a general-purpose type graphite sheet having a thickness of 0.12 and 0.3 mm are used. It was.
For each example and each comparative example, the four-terminal method was performed at room temperature, and the test results shown in Table 3 below were obtained as electrical specific resistance.
上記表３から、比較例のものは、厚みが増加するにつれて電気比抵抗も増加するのに対して、実施例２のものは、厚みが増加しても電気比抵抗も略一定であることが確認された。 From Table 3 above, the electrical resistivity of the comparative example increases as the thickness increases, whereas the electrical resistivity of Example 2 is substantially constant as the thickness increases. confirmed.
上記試験（１）および（２）より、本発明の高熱伝導異方性黒鉛材料の製造方法によれば、黒鉛シートに比して面方向と厚さ方向の熱伝導率の差が小さく、厚みの変化によっても電気比抵抗が略一定の新規な特性を有する高熱伝導異方性黒鉛材料を作製できることが確認された。 From the above tests (1) and (2), according to the method for producing a highly heat-conductive anisotropic graphite material of the present invention, the difference in the thermal conductivity between the plane direction and the thickness direction is smaller than that of the graphite sheet. It was confirmed that a highly heat-conductive anisotropic graphite material having novel characteristics with a substantially constant electrical specific resistance can be produced even by the change in.
本発明の高熱伝導異方性黒鉛材料の製造方法にて作製された高熱伝導異方性黒鉛材料が、厚みが増加しても電気比抵抗も略一定となる原因は明確ではないが、黒鉛シートが薄片の層状体であるため厚みが増加すると電気比抵抗も増加するのに対して、本発明の高熱伝導異方性黒鉛材料は薄片が粉砕されているため電気比抵抗が略一定となるものと推測される。厚さにより電気比抵抗が増加する黒鉛シートに比して、厚みが増加しても電気比抵抗は略一定の本発明の高熱伝導異方性黒鉛材料の方が一般的には有用であり、また、面方向と厚さ方向の熱伝導率の差が小さい本発明の高熱伝導異方性黒鉛材料の方が、それが大きい黒鉛シートより一般的には有用であり、例えば従来の黒鉛シートの代替品等として、伝熱材、電池部品の他、携帯電話、ノートパソコン、レーザー機器、車載機器などのヒートシンク（放熱板）、ヒートスプレッダ（緩衝板）等として好適に使用できる。 The reason why the high thermal conductivity anisotropic graphite material produced by the method for producing the high thermal conductivity anisotropic graphite material of the present invention is substantially constant even when the thickness is increased is not clear, but the graphite sheet Is a layered body of flakes, the electrical resistivity increases as the thickness increases, whereas the highly heat-conductive anisotropic graphite material of the present invention has a substantially constant electrical resistivity because the flakes are crushed It is guessed. Compared to a graphite sheet whose electrical resistivity increases with thickness, the highly thermally conductive anisotropic graphite material of the present invention in which the electrical resistivity is substantially constant even when the thickness is increased is generally more useful, Further, the high thermal conductivity anisotropic graphite material of the present invention having a small difference in thermal conductivity between the plane direction and the thickness direction is generally more useful than a graphite sheet having a large thermal conductivity. As an alternative, in addition to heat transfer materials and battery parts, it can be suitably used as a heat sink (heat radiating plate), heat spreader (buffer plate), etc. for mobile phones, notebook computers, laser devices, in-vehicle devices and the like.
１ 高熱伝導異方性黒鉛材料 1 High thermal conductivity anisotropic graphite material
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| JP2002083913A (en) * | 2000-09-07 | 2002-03-22 | Nippon Leakless Corp | Expanded graphite heat sink |
| JP2003060141A (en) * | 2001-08-20 | 2003-02-28 | Otsuka Denki Kk | Super heat conductor and cooling unit using the same |
| JP2006100379A (en) * | 2004-09-28 | 2006-04-13 | Kaneka Corp | Heat sink |
| JP3122382U (en) * | 2006-03-31 | 2006-06-08 | 大塚電機株式会社 | Thermal conduction member, heat dissipation structure, and electronic equipment |
| JP2007012912A (en) * | 2005-06-30 | 2007-01-18 | Polymatech Co Ltd | Thermal conductive member and cooling structure using the same |
| JP2007217206A (en) * | 2006-02-15 | 2007-08-30 | Kaneka Corp | Graphite film, thermal diffusion film using the same and thermal diffusion method using the same |
| JP2010171030A (en) * | 2008-12-22 | 2010-08-05 | Kaneka Corp | Heat radiating structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002083913A (en) * | 2000-09-07 | 2002-03-22 | Nippon Leakless Corp | Expanded graphite heat sink |
| JP2003060141A (en) * | 2001-08-20 | 2003-02-28 | Otsuka Denki Kk | Super heat conductor and cooling unit using the same |
| JP2006100379A (en) * | 2004-09-28 | 2006-04-13 | Kaneka Corp | Heat sink |
| JP2007012912A (en) * | 2005-06-30 | 2007-01-18 | Polymatech Co Ltd | Thermal conductive member and cooling structure using the same |
| JP2007217206A (en) * | 2006-02-15 | 2007-08-30 | Kaneka Corp | Graphite film, thermal diffusion film using the same and thermal diffusion method using the same |
| JP3122382U (en) * | 2006-03-31 | 2006-06-08 | 大塚電機株式会社 | Thermal conduction member, heat dissipation structure, and electronic equipment |
| JP2010171030A (en) * | 2008-12-22 | 2010-08-05 | Kaneka Corp | Heat radiating structure |
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