Array formation by ultrasound standing waves with solidification of liquid-suspended micro-particles

In the present article, ultrasound technology is proposed using the spatial periodic force distribution of radiation pressure. For applying ultrasound to the solidification of suspended microparticles, the details of a periodicity array of composite materials and its construction methodology are described. Suspended particles of polyethylene and silica with a concentration of less than 1.0 wt. % were used. A periodic arrangement of particles in distilled water using the ultrasound radiation pressure distribution was confirmed. A solidification process from liquid to solid under this periodic arrangement was also observed and was related to temperature. In the case of silica particles, the dendrites in primary ice crystals and their growth conditions were investigated. The ice crystals grew parallel to the periodically arranged particles.