Sound velocity and attenuation coefficient of hard and hollow microparticle suspensions observed by ultrasound spectroscopy

Kohjiro Kubo; Tomohisa Norisuye; Thao Nguyen Tran; Daisuke Shibata; Hideyuki Nakanishi; Qui Tran-Cong-Miyata

doi:10.1016/j.ultras.2015.05.016

Sound velocity and attenuation coefficient of hard and hollow microparticle suspensions observed by ultrasound spectroscopy

Ultrasonics. 2015 Sep:62:186-94. doi: 10.1016/j.ultras.2015.05.016. Epub 2015 May 28.

Authors

Kohjiro Kubo¹, Tomohisa Norisuye², Thao Nguyen Tran¹, Daisuke Shibata¹, Hideyuki Nakanishi¹, Qui Tran-Cong-Miyata¹

Affiliations

¹ Department of Macromolecular Science and Engineering, Graduate School of Science & Technology, Kyoto Institute of Technology Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
² Department of Macromolecular Science and Engineering, Graduate School of Science & Technology, Kyoto Institute of Technology Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan. Electronic address: nori@kit.jp.

PMID: 26067926
DOI: 10.1016/j.ultras.2015.05.016

Abstract

Size and elastic properties of micro-particles suspended in liquid can be acoustically determined by ultrasound attenuation and velocity measurements with the aid of elastic scattering theories and a dispersion relation. While quantitative evaluation for hard micron-sized spheres using the theories is available in literature, that for hollow particles is not yet achieved. In this study, we show that the shell thickness and the elastic modulus of hollow particles can be quantitatively evaluated by ultrasound spectroscopy. Several kinds of microparticles including polystyrene rigid particles, polydivinylbenzene rigid particles, borosilicate hollow particles, and phenolic-resin hollow particles were examined as a function of the particle concentration.

Keywords: Attenuation; Hollow particle; Scattering; Sound velocity.