采用熔融共混法制备高密度聚乙烯(HDPE)/膨胀石墨(EG)/石蜡导热定形相变材料(PCM),并对其渗漏率、微观形貌、导热性能和相变潜热进行研究.结果表明:导热定形相变材料中,HDPE,EG和石蜡三种组分具有较好的相容性;PCM中添加EG时渗漏率有所提高,但渗漏率随EG含量的增加而降低;EG含量为15％(质量分数)时,PCM渗漏率低于0.6％;PCM热导率随EG含量的增加而增加,EG含量为15％时,热导率达到1.265W/(m·K);PCM的相变潜热随EG含量的增加变化不大.
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