【摘要】 室温金属流体在芯片散热领域中正日益显示重要价值,但相关材料的热物性比较缺乏。本文基于Faber-Ziman理论和Wiedemann-Franz-Lorenz定律,采用Ashcroft-Langrethp硬球模型偏结构因子以及空核心模型赝势计算了液态二元镓铟及钠钾合金的热导率。结果表明:相比于钠钾合金的热导率随原子组分浓度呈抛物线变化,镓铟合金的热导率与原子组分浓度呈单调变化关系,同时镓铟合金的热导率随着温度升高而升高。作为对比,本文同时也对镓铟合金的热导率进行了实验测定。结合所获数据及钠钾合金文献数据对比,表明计算结果与实验值符合得较好.本文工作为进一步研究二元合金热导率打下了基础。更多还原

【Abstract】 Low-melting-point metals are playing increasingly important roles in the field of chip cooling.However,there is still a strong lack of thermophysical properties of these metals or alloys. Based on Faber-Ziman theory and Wiedemann-Franz-Lorenz law,Ashcroft-Langrethp structure factor and empty-core pseudopotential are adopted to calculate the thermal conductivity of liquid Ga-In and Na-K alloys.The results demonstrate that compared with a parabolic curve in Na-K alloys,the thermal conductivity of Ga-In alloys takes a monotonic relation with concentration and increases with temperature.Furthermore,the experimental measurement of the thermal conductivity of Ga-In alloys is also conducted.It is demonstrated that the calculated results accord very well with the present experiments and the previous published data.This work laid a foundation for future research of the thermal conductivity of binary alloys.更多还原