PRODUCTION METHOD OF METAL-CARBON PARTICLE COMPOSITE

• Main Authors: HIROSE KATSUMASA, WAKABAYASHI SHOICHIRO
• Format: Patent
• Language: English; Japanese
• Published: 17.01.2019
• Subjects: ALLOYS; BASIC ELECTRIC ELEMENTS; CHEMISTRY; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; SEMICONDUCTOR DEVICES; TREATMENT OF ALLOYS OR NON-FERROUS METALS

To provide a production method of a metal-carbon particle composite having high heat conductivity.SOLUTION: A production method of a metal-carbon particle composite includes a step for obtaining a coated foil 12 that is formed by laying a carbon particle layer 11 on the surface 10a to be coated of a metal foil 10, by coating the surface 10a to be coated of the metal foil 10 with a coating liquid 5 containing carbon particles 1, a step for forming a laminate by laminating a plurality of the coated foils 12, and a step for sintering the laminate. The carbon particle 1 has an average length larger than 100 μm in the longest axis direction. In the step for obtaining the coated foil 12, the surface 10a to be coated of the metal foil 10 is coated with the coating liquid 5 by a gravure coating method using a gravure roll 31. A slant-type cell 32 is formed as a gravure cell on a peripheral surface 31a of the gravure roll 31. The slant-type cell 32 has a width of three or more times the average length of the carbon particle 1 in the longest axis direction.SELECTED DRAWING: Figure 2 【課題】高い熱伝導率を有する金属−炭素粒子複合材の製造方法を提供すること。【解決手段】金属−炭素粒子複合材は、炭素粒子１を含む塗工液５を金属箔10の塗工予定表面10aに塗工することにより金属箔10の塗工予定表面10aに炭素粒子層11が形成された塗工箔12を得る工程と、塗工箔12が複数積層された状態の積層体を形成する工程と、積層体を焼結する工程と、を具備する。炭素粒子１の最長軸方向の平均長さは１００μｍよりも大きい。塗工箔12を得る工程では、グラビアロール31を用いたグラビア塗工方法により塗工液５を金属箔10の塗工予定表面10aに塗工する。グラビアロール31はその周面31aにグラビアセルとしての斜線型セル32が形成されたものである。斜線型セル32の幅は炭素粒子１の最長軸方向の平均長さの３倍以上である。【選択図】図２