Cylindrical Acoustic Levitator/Concentrator

A low-power, inexpensive acoustic apparatus for levitation and/or concentration of aerosols and small liquid/solid samples having particulates up to several millimeters in diameter in air or other fluids is described.

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Cylindrical Acoustic Levitator/Concentrator

A low-power, inexpensive acoustic apparatus for levitation and/or concentration of aerosols and small liquid/solid samples having particulates up to several millimeters in diameter in air or other fluids is described. It is constructed from a commercially available, hollow cylindrical piezoelectric crystal which has been modified to tune the resonance frequency of the breathing mode resonance of the crystal to that of the interior cavity of the cylinder. When the resonance frequency of the interior cylindrical cavity is matched to the breathing mode resonance of the cylindrical piezoelectric transducer, the acoustic efficiency for establishing a standing wave pattern in the cavity is high. The cylinder does not require accurate alignment of a resonant cavity. Water droplets having diameters greater than 1 mm have been levitated against the force of gravity using; less than 1 W of input electrical power. Concentration of aerosol particles in air is also demonstrated.

U.S. Patent No.: 6,467,350 (DOE S-94,727)

Patent Application Filing Date: March 15, 2001

Patent Issue Date: October 22, 2002

Licensing Status:

Available for Express Licensing(?). View terms and a sample license agreement.

For more information, contact Licensing@lanl.gov.


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