【摘要】 采用微波辅助乙二醇法,通过调节微波处理时间,制备了不同长径比的纳米银材料。用TEM和XRD对不同长径比的纳米银进行了表征。以不同长径比的纳米银作为导热填料制备导热胶,研究发现对于填充不同长径比的纳米银材料,导热胶的阈值填充量是不同的。长径比越大阈值越小。运用修正的Nielsen-lewis阈值理论对这一实验现象进行了合理解释,模拟结果表明,修正的阈值理论与实验结果非常吻合。更多还原

【Abstract】 Nanostructured silver with different slenderness ratio was prepared by a microwave(MW) assisted method.The nano-silver were characterized by scanning electron microscope(SEM) and X-ray diffraction(XRD).Thermal conductive adhesive(TCA) were prepared by using the different slenderness ratio nano-silver as the thermal conductive filler.The thermal conductivity of the adhesive was measured.The result indicated that the slenderness ratio of the nano-silver had important influence on it’s percolation threshold.Three kinds of percolation threshold theory were used to simulate the experiment results.The simulation results obtained by using modified Nielsen-lewis model were good agree with the experimental results.更多还原