title: Acoustic levitation with self-adaptive flexible reflectors.
abstract: Two kinds of flexible reflectors are proposed and examined in this paper to improve the stability of single-axis acoustic levitator, especially in the case of levitating high-density and high-temperature samples. One kind is those with a deformable reflecting surface, and the other kind is those with an elastic support, both of which are self-adaptive to the change of acoustic radiation pressure. High-density materials such as iridium (density 22.6 gcm(-3)) are stably levitated at room temperature with a soft reflector made of colloid as well as a rigid reflector supported by a spring. In addition, the containerless melting and solidification of binary In-Bi eutectic alloy (melting point 345.8 K) and ternary Ag-Cu-Ge eutectic alloy (melting point 812 K) are successfully achieved by applying the elastically supported reflector with the assistance of a laser beam.
authors.affiliation: Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072, China.
authors.forename: Z Y
authors.initials: ZY
authors.lastname: Hong
authors.forename: W J
authors.initials: WJ
authors.lastname: Xie
authors.forename: B
authors.initials: B
authors.lastname: Wei