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发明公开
CN107792851A 一种天然石墨散热膜的简易制备方法 无效 - 驳回

一种天然石墨散热膜的简易制备方法
摘要：
本发明涉及一种大尺寸天然石墨散热膜的简易制备方法，以天然的鳞片石墨作为原料，通过液相膨胀的方法，得到高膨胀倍率的液相膨胀石墨，将膨胀石墨洗净烘干后，再放在离型膜上，通过压延直接将膨胀石墨压制成天然石墨膜。应用本方法可以非常简易地制得厚度20-150 μm，宽度约200 mm，长度大于500 mm的低成本天然石墨膜，其面内的热导率可以达到600 W m-1 K-1，电导率可以达到3400 S cm-1。
摘要（英）：

The invention relates to a simple preparation method of a natural graphite cooling film. The method includes: using natural scale graphite as a raw material, and carrying out a liquid-phase expansionmethod to obtain liquid-phase expanded graphite high in expansion ratio; washing and drying the expanded graphite, putting the same on a release film, and directly pressing the expanded graphite to bethe natural graphite film through calendering. By apply the method, the natural graphite film low in cost and of 20-150um in thickness, 200mm in width and greater than 500mm in length can be preparedquite simply, in-plane heat conductivity of the natural graphite film can reach 600 W m-1 K-1, and conductivity can reach 3400 S cm-1.

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