轻质磁性镓铟液态金属复合材料的制备及其性能研究

Preparation and Properties of EGaIn Liquid Metal Composite Material

摘要: 通过机械混合的方式将共晶镓铟合金(EGaIn)、空心玻璃微珠、磁性纳米铁粉颗粒混合制备出一种轻质且具有一定磁性特征的复合材料。实验测试证明其具有低密度(最低可达液态金属的24.3%)、刚度变异性，饱和磁化强度能够达到34.44 emu/g，剩余磁化强度达0.033 emu/g，使得液态金属复合材料更易在垂直结构上进行几何变化与空间变化，强化了液态金属在立体空间的可控性，以满足更多应用领域的需求，更可以在一定程度上促进液态金属在流体学、电磁学甚至是在航空航天领域的进一步发展。

Abstract: A lightweight composite material exhibiting specific magnetic characteristics was fabricated through the mechanical blending of eutectic gallium-indium alloy (EGaIn), hollow glass beads, and magnetic iron nanopowder particles. Empirical investigations have confirmed its reduced density (as low as 24.3% compared to that of liquid metal) and variable stiffness. Notably, the saturation magnetization strength can reach 34.44 emu/g, while the residual magnetization strength attains 0.033 emu/g. These attributes facilitate geometric and spatial alterations within the vertical structure of liquid metal composites, enhancing the controllability of liquid metal in three-dimensional space and addressing the requirements of diverse applications. Furthermore, this composite material holds the potential to advance the progress of liquid metal in the domains of fluidics, electromagnetics, and even aerospace to a certain extent.