镓基液态金属热界面材料的性能研究

Investigation on the Performance of Gallium Based Liquid Metal Thermal Interface Materials

采采用微氧化法制备Ga基室温液态金属热界面材料。实验结果表明,微量氧化镓的存在可显著改善液态金属的润湿性,且GaIn10合金热界面材料具有较高的热导率(约19.2 W·m^(-1)·K^(-1))。搭建接触传热测试平台,分别研究液态金属Ga及其二元、三元合金热界面材料的导热性能,对比市售导热硅脂,该新型镓基热界面材料,特别是其二元合金热界面材料,在大功率下工作时热源温度相对于导热硅脂下降近14℃,界面热阻只有5.4 Kmm^2/W,显示出更加优越的导热性能。

The gallium alloy based thermal interface materials （TIMs） were synthesized by a micro-oxidation reaction method. The experimental results indicated that the existence of Ga203 could effectively improve the wettability of gallium alloys with other materials and the measured highest thermal conductivity was as high as 19.2 Wm^-1K^-1 for Gain10 based TIMs at room temperature. An experimental apparatus was designed to measure the thermal resistance across the gallium and its alloys based TIMs under steady-state conditions. The temperature of heat source of this novel gallium based TIMs, especially for that of GaIn10 based TIMs, decreasesed by 14℃ and the thermal interface resistance was as low as 5.4 Kmm^2/W. Gallium based TIMs were believed to have remarkable advantages over already commercialized thermal interface materials with regard to higher thermal conductivity, lower thermal resistance, and better adhesion.