New ultrasonic dispersion method for nanoparticles using cylindrical piezoelectric transducer

Author

Kim, Jungsoon ; Kim, Moojoon ; Ha, Kanglyeol

Author_Institution

Dept. of Media Eng., Tongmyong Univ., Busan, South Korea

fYear

2010

fDate

11-14 Oct. 2010

Firstpage

2072

Lastpage

2075

Abstract

Dispersion of powders into liquids has become one of the most important techniques in high-tech industries and it is a common process in the formulation of various products, such as paint, ink, shampoo, beverages, and polishing media. In this study, an ultrasonic system with a cylindrical transducer is newly introduced for pure nanoparticles dispersion. The acoustics pressure field and the characteristics of the shock pulse caused by cavitations are investigated. The frequency spectrum of the pulse from the collapse of air bubbles in the cavitations is analyzed theoretically. It was confirmed that Al₂O₃ suspension can be dispersed effectively using the suggested system.

Keywords

bubbles; cavitation; nanoparticles; piezoelectric transducers; powders; shock waves; ultrasonic dispersion; acoustics pressure field; air bubbles; cavitation; cylindrical piezoelectric transducer; powder dispersion; pure nanoparticle dispersion; shock pulse characteristic; ultrasonic dispersion method; Acoustics; Aluminum oxide; Dispersion; Electron tubes; Nanoparticles; Suspensions; Transducers; cylindrical piezoelectric ceramis; dispersion; focusing; nanoparticle; ultrasound;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium (IUS), 2010 IEEE

Conference_Location

San Diego, CA

ISSN

1948-5719

Print_ISBN

978-1-4577-0382-9

Type

conf

DOI

10.1109/ULTSYM.2010.5935609

Filename

5935609