Abstract

The need for new heat transfer agent for many applications, namely in the consumer electronics industry, requires materials, liquids at room temperature, with high thermal conductivity. From the different possibilities, Galinstan, a eutectic alloy of Gallium, Indium, and Tin with a melting point (T_m = 283.4 K) has been proposed for many applications, namely for replacing the toxic mercury element, used for many years. It is the purpose of this paper to report thermal conductivity measurements of Galinstan, product name Gallium/Indium/Tin Eutectic (NL-011), Ga_68.4In_21.5Sn₁₀. The method used was the transient hot strip (THS), using a platinum metal-film sensor, produced by PVD in ceramic substrates, and electrically insulated with a heat-shrinkable coating. The details of the data acquisition system and measuring procedure are reported. Measurements were performed between 28 °C and 103 °C (301 K to 376 K), at atmospheric pressure, with an estimated uncertainty of 6%, and compared with available literature. Data were correlated for linear interpolation. This type of sensor is applied to molten metals for the first time, proofing to concept to future applications in molten metals and molten salts at higher temperatures.

Graphical Abstract

中文翻译：

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近共晶Galinstan (Ga68.4In21.5Sn10)熔融合金的热导率

摘要

许多应用（即消费电子行业）需要新型传热剂，需要室温下具有高导热率的材料、液体。从不同的可能性来看，Galinstan，一种具有熔点（T _m  = 283.4 K）的镓、铟和锡的共晶合金，已被提议用于许多应用，即用于替代使用多年的有毒汞元素。本文的目的是报告 Galinstan 的热导率测量结果，产品名称为镓/铟/锡共晶 (NL-011)，Ga _68.4 In _21.5 Sn ₁₀。所采用的方法是瞬态热剥离 (THS)，使用铂金属膜传感器，通过 PVD ​​在陶瓷基板上生产，并用热收缩涂层进行电绝缘。报告了数据采集系统和测量程序的详细信息。测量在 28 °C 至 103 °C（301 K 至 376 K）、大气压下进行，估计不确定度为 6%，并与现有文献进行了比较。数据进行线性插值相关。这种类型的传感器首次应用于熔融金属，为未来在更高温度下熔融金属和熔盐的应用提供了概念验证。

图形概要