Thermal Conductivity Determination of Ga-In Alloys for Thermal Interface Materials Design
Thermal Conductivity Determination of Ga-In Alloys for Thermal Interface Materials Design
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DOI：
10.3390/thermo2010001
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发表时间：
2021-12
期刊：
影响因子：
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通讯作者：
Parker Maivald;Soumya Sridar;W. Xiong
中科院分区：
文献类型：
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作者：
Parker Maivald;Soumya Sridar;W. Xiong
热界面材料（TIM）在工作温度下以液态存在，可以在电子应用中实现相邻两个表面的有效传热。本文首次测量了不同组成和温度下Ga-In体系中不同相区的导热系数。改进的比较切割棒技术用于测量GaxIn1−x （x = 0,0.1, 0.214, 0.3和0.9）合金在40,60,80和100°C的导热系数，在消费电子产品中经常遇到的温度。液态和半液态（液态+ β） Ga-In合金的导热系数高于目前消费电子产品中使用的大多数TIM。这些测量量与文献中可用的实验数据一起，作为使用CALPHAD（计算相图）方法对纯元素、溶液和两相区域的导热系数参数进行优化的输入。得到了一组描述Ga-In体系导热系数的自洽参数。在所有相的热导率测量值和计算值之间有很好的一致性。由于易于制造和高导热性，液态/半液态Ga-In合金在消费电子领域具有巨大的TIM潜力。
Thermal interface material (TIM) that exists in a liquid state at the service temperature enables efficient heat transfer across two adjacent surfaces in electronic applications. In this work, the thermal conductivities of different phase regions in the Ga-In system at various compositions and temperatures are measured for the first time. A modified comparative cut bar technique is used for the measurement of the thermal conductivities of GaxIn1−x (x = 0, 0.1, 0.214, 0.3, and 0.9) alloys at 40, 60, 80, and 100 °C, the temperatures commonly encountered in consumer electronics. The thermal conductivity of liquid and semi-liquid (liquid + β) Ga-In alloys are higher than most of the TIM’s currently used in consumer electronics. These measured quantities, along with the available experimental data from literature, served as input for the thermal conductivity parameter optimization using the CALPHAD (calculation of phase diagrams) method for pure elements, solution phase, and two-phase region. A set of self-consistent parameters for the description of the thermal conductivity of the Ga-In system is obtained. There is good agreement between the measured and calculated thermal conductivities for all of the phases. Due to their ease of manufacturing and high thermal conductivity, liquid/semi-liquid Ga-In alloys have significant potential for TIM in consumer electronics.