Erythritol is a great potential phase change material, but very vulnerable to occurring supercooling. By adding nano-materials as a nucleating agent to improve the performance of erythritol, the phase change composites were prepared with different nanomaterials. And the impact of adding material on erythritol was analyzed by drawing the time-temperature curve of melt-solidification process. The thermal conductivity and latent heat were measured. By ultrasonic oscillation, nano-alumina can be well dispersed in the melted erythritol. The nano-alumina can effectively alleviate the strong undercooling tendency of erythritol; when the mass fraction of nano-alumina material is 0. 25% , the thermal conductivity of material increases twice as much as that of pure erythritol, and the latent heat does not have significant changes.%赤藻糖醇是一种极具潜力的相变材料但很容易发生过冷.文中通过添加纳米材料作为成核剂改善赤藻糖醇的性能,制备了不同纳米材料的相变复合材料.对样品的融化-凝固过程进行观测记录,绘制了时间温度曲线并对导热系数和相变潜热进行测定,分析了添加材料对赤藻糖醇的影响.结果表明:在简单的超声振荡分散方式下添加纳米氧化铝可以很好地分散于融化的赤藻糖醇基液中.添加的纳米氧化铝能有效缓和赤藻糖醇的强过冷倾向；当添加质量分数为0.25％的纳米氧化铝时材料的导热系数较纯赤藻糖醇提高2倍,且相变潜热不发生较大变化.
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