吴海华,魏恒,吴正佳,郝佳欢,戢运鑫,曾世渝,李思维

• 1:三峡大学机械与动力学院
• 2:三峡大学石墨增材制造技术与装备湖北省工程研究中心

摘要(Abstract)：

以天然鳞片石墨、酚醛树脂以及中间相碳微球为主要原料，制备多孔石墨预制体，经石墨化处理后再与环氧树脂复合，获得高导热石墨/环氧树脂复合材料。研究了素坯成形密度和粉末组成对多孔石墨预制体X-Y方向的导热性能与孔隙率的影响。结果表明：预制体内部石墨片定向排列，酚醛树脂与中间相碳微球连接其间，形成定向多孔网络结构，实现高导热、高孔隙与大孔径的协同。当素坯成形密度为1.4 g/cm~3,天然鳞片石墨、酚醛树脂、中间相碳微球的含量分别为67.5 mass%、17.5 mass%和15 mass%时，多孔石墨预制体X-Y方向导热性能达到286.97 W/(m·K),气孔率达到44.56%;此时，石墨/环氧树脂复合材料X-Y方向导热性能达到116.81 W/(m·K)、抗压强度为26 MPa,在电子封装领域具有潜在的应用前景。

关键词(KeyWords)： 高导热;定向排列结构;天然鳞片石墨;多孔材料制备

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51575313)

作者(Author): 吴海华,魏恒,吴正佳,郝佳欢,戢运鑫,曾世渝,李思维

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