Uniformly Distributed Sub-microsized Galinstan Liquid Metal Microspheres Prepared by Ultrasoic Method

Gallium-indium-tin alloy (Galinstan) liquid metal microspheres were prepared by ultrasonic method, and the effects of ultrasonic process parameters on the diameter of Galinstan microspheres were studied. Then, the uniformly distributed sub-microsized Galinstan microspheres were obtained by controlling the settling time. The results show that the diameter of Galinstan microspheres decreased with the increase of ultrasonic time and power, and increased with the increase of ultrasonic temperature and solvent surface tension. By optimizing the ultrasonic process parameters, Galinstan microspheres with the diameter less than 2 μm could be obtained. Galinstan microspheres with a diameter range of 0.2-0.8 μm could be obtained by multiple sedimentation to remove the large-size microspheres. This method could greatly improve the homogeneity of particle diameter distribution of the microspheres.