采用高能球磨法制备了纳米铜/石蜡复合材料.通过TEM、SEM、XRD和DSC对复合材料的微观形貌、物相及相变温度和潜热进行了表征和分析,并研究了铜含量对复合材料的热敏性、热膨胀性和热稳定性的影响.结果表明:石蜡包覆在铜粒表面,能显著提高其抗氧化性,铜/石蜡复合颗粒近似球形,粒径约为100 nm,多个复合颗粒易团聚形成微米级颗粒；铜含量对相变温度没有明显影响,但相变潜热随铜含量的增加近似线性减少；复合材料的热敏性随着铜含量的增加而提高,但其热膨胀性则降低；铜质量分数为60％的复合材料具有较短的升温时间,体膨胀率降低较小,且多次加热后稳定性较好,可作为此类热敏微驱动器的理想材料.
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