隐晶质石墨/PVA复合材料导热性能分析

Thermal analysis of aphanitic graphite/PVA composites

以隐晶质石墨/PVA导热复合材料为研究对象,分析了影响其导热性能的因素,并提出了热导率模型。结果表明,影响隐晶质石墨/PVA复合材料导热的因素有含量、杂质、粒径及厚度,其热导率随着石墨含量的增加、杂质的减少、粒径的增大、包覆膜PVA厚度的减小而增加。所得到的隐晶质石墨/PVA复合材料热导率数学模型计算值与实验所测热导率值接近,最小相对误差为0.935%,最大相对误差为12.558%。研究结果将为后续研究提供参考。

This paper takes the aphanitic graphite/PVA thermal conductive composite as the research object,and analyzes the factors influencing the thermal conductivity,and puts forward a mathematic model of thermal conduction.The results show that the factors that influence the aphanitic graphite/PVA composites thermal conductivity include the content of impurities,grain size and thickness.Its thermal conductivity increased with the increasing of graphite content and grain size,the decreasing of graphite impurities and the coating thickness.The values calculated with the measured thermal conductivity close to the mathematical model of the percentage of Aphanitic Graphite/PVA composites thermal conductivity,the minimum relative error is 0.935%,while the maximum relative error is 12.558%.The results of the study will provide a reference for the follow-up study.