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根据电子器件散热技术领域对热适应复合材料的性能要求,选取导热系数高且密度低的膨胀石墨作为无机支撑材料,石蜡作为有机相变材料,制备出高导热系数和储热密度的热适应复合相变材料。采用扫描电镜(SEM)、差示扫描量热仪(DSC)、偏光显微镜(POM)和Hot Disk热常数分析仪等多种测试技术,对复合相变材料进行分析研究;通过储/放热实验和1000次热循环实验研究了复合相变材料的传热性能和热稳定性。实验结果说明该复合相变材料具有形状稳定、导热率高、储热密度大等特点,并具有良好的热稳定性和使用寿命。
According to the performance requirements of heat-adapted composite materials in the field of electronic device cooling technology, expanded graphite with high thermal conductivity and low density is selected as an inorganic supporting material and paraffin as an organic phase-change material to prepare a heat-adapted composite with high thermal conductivity and heat storage density Phase change material. The composite phase change materials were analyzed and analyzed by SEM, DSC, POM and Hot Disk thermal constant analyzers. Through the storage / exothermic experiments And 1000 thermal cycles experiments were conducted to study the heat transfer and thermal stability of the composite phase change material. The experimental results show that the composite phase change material has the characteristics of stable shape, high thermal conductivity and large heat storage density, and has good thermal stability and service life.