期刊
SENSORS AND ACTUATORS A-PHYSICAL
卷 145, 期 -, 页码 437-441出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2008.01.001
关键词
surface acoustic wave (SAW) atomizer; ultrasonic atomization; high-frequency atomization; surface acoustic wave atomizer and electrostatic deposition (SAW-ED)
High-frequency surface acoustic wave (SAW) atomizers, with resonance frequencies in the range from 50 to 95 MHz, were newly constructed and tested. Atomization characteristics were evaluated in terms of atomization speed and deposited dry particle diameter distribution. Dry nano-sized particles formed from atomized droplets were collected by means of electrostatic force and the size distribution was measured by field-emission-type scanning electron microscopy. Mean diameters of original droplets formed by atomization were estimated to be 5.7 mu m (50 MHz), 4.4 mu m (75 MHz) and 2.7 mu m (95 MHz), respectively, from the dry particle diameter distribution. By collecting dried nanoparticles, it was confirmed that atomization by high-frequency SAW device occurred rather than thermal evaporation. The drop size was slightly larger than Lang's estimation predicting the relationship between drop size and atomization frequency. (c) 2008 Elsevier B.V. All rights reserved.
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