公开(公告)号：KR100698727B1

公开(公告)日：2007-03-23

申请号：KR1020060070912

申请日：2006-07-27

Applicant: 자화전자(주)

Inventor： 김승호 ,  박성하 ,  강동완 ,  김효영 ,  홍성민 ,  김인호

IPC: C01B31/04 ,  C04B35/536

CPC classification number: C01B32/20 ,  C01B32/22 ,  C04B35/536

Abstract: A graphite sheet and a manufacturing method thereof are provided to manufacture a graphite sheet of a high thermal conductivity in a surface direction and in a thickness direction by mixing graphite of different expansion multiples together. A method for manufacturing a graphite sheet includes the steps of processing natural graphite with intercalate solution of which a concentration is controlled to be 20-80 times of an expansion multiple of expanded graphite, draining a surplus solution from the intercalate-processed natural graphite and washing the same, forming expanded graphite in the shape of worm by exposing the washed natural graphite to an increased temperature, wherein the graphite is expanded by 20-80 times of an original volume thereof, and forming a semi-anisotropic graphite sheet having a thermal anisotropic coefficient in the range from 3 to 20 by carrying out compression rolling molding for the expanded graphite.

Abstract translation: 提供石墨片及其制造方法，通过将不同膨胀倍数的石墨混合在一起，在表面方向和厚度方向上制造高导热性的石墨片。 一种制造石墨片的方法包括以下步骤：将天然石墨的加入浓度控制在膨胀石墨的膨胀倍数的20-80倍之内，从插层处理的天然石墨中排出多余的溶液并洗涤 通过将经洗涤的天然石墨暴露于升高的温度下形成蜗杆形状的膨胀石墨，其中石墨膨胀其原始体积的20-80倍，并且形成具有热各向异性的半 - 各向异性石墨片 通过对膨胀石墨进行压缩成型，其系数在3〜20的范围内。