1994
DOI: 10.1063/1.1145157
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Aero-acoustic levitation: A method for containerless liquid-phase processing at high temperatures

Abstract: A method for containerless liquid-phase processing was developed which has practical application in process and property research on virtually any material which is involatile at the melting point. It combines aerodynamic and acoustic forces to support and position the levitated material. The design provides forced convection control of the thermal boundary in the gas surrounding beam-heated specimens, which stabilizes the acoustic forces and allows acoustic positioning necessary to stabilize the aerodynamic l… Show more

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Cited by 150 publications
(58 citation statements)
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“…Vitrification of forsterite was achieved in an aero-acoustic [Weber et al, 1994] or aerodynamic levitator [Weber and Nordine, 1995]. Samples were levitated in a stream of pure oxygen, melted using a continuous-wave CO• laser, and cooled by blocking the laser beam.…”
Section: Synthesis Methods and Glass Compositionmentioning
confidence: 99%
“…Vitrification of forsterite was achieved in an aero-acoustic [Weber et al, 1994] or aerodynamic levitator [Weber and Nordine, 1995]. Samples were levitated in a stream of pure oxygen, melted using a continuous-wave CO• laser, and cooled by blocking the laser beam.…”
Section: Synthesis Methods and Glass Compositionmentioning
confidence: 99%
“…A further advantage of containerless levitation is that supercooled liquids can be studied which is difficult or impossible with more conventional furnaces because the container induces nucleation. In the containerless levitator technique [35,36], a bead of refractory sample material is placed on a watercooled conical nozzle and levitated by a gas jet, the bead can be laser heated to temperatures of up to 3050 K [37]. The absence of heterogeneous nucleate sites means that liquids can be supercooled up to a few hundred degrees below the stable liquidus curve.…”
Section: Introductionmentioning
confidence: 99%
“…these are electromagnetic [9], electrostatic [10], aerodynamic [11] and aero-acoustic levitations [12]. Containerless processing assures measurements of thermophysical properties of molten semiconductors; usually it is very difficult to measure thermophysical properties of molten semiconductors, because they have high melting temperatures, and are chemically reactive and opaque in the visible region.…”
Section: 2 Andmentioning
confidence: 99%