Levitation of iridium and liquid mercury by ultrasound.
Single-axis acoustic levitation of the heaviest solid (iridium, rho=22.6 g cm(-3)) and liquid (mercury, rho=13.6 g cm(-3) on the Earth is achieved by greatly enhancing both the levitation force and stability through optimizing the geometric parameters of the levitator. The acoustically levitated Pb-Sn eutectic alloy melt (rho=8.5 g cm(-3)) is highly undercooled by up to 38 K, which results in a microstructural transition of "lamellae-broken lamellae-dendrites." The drastic enhancement of levitation capability indicates a broader application range of single-axis acoustic levitation.
Xie
W J
WJ
Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China.
Cao
C D
CD
Lü
Y J
YJ
Wei
B
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