Materials for Energy, Efficiency and Sustainability: TechConnect Briefs 2015Materials for Energy, Efficiency and Sustainability TechConnect Briefs 2015

Nanomaterials for Catalysis Chapter 3

Cavitation Disintegration of Microparticles and Nanoparticles in Dense Liquid Dispersions

R. Dvorsky, L. Svoboda, J. Trojková, J. Bednář, P. Mančík, B. Kostura
Vysoká škola báňská – Technická univerzita Ostrava, Czech Republic

pp. 111 - 114

Keywords: nanoparticles, silicon, disintegration, cavitation

With the current rapid development of nanotechnology, top-down preparation of nanoparticles by various disintegration techniques became an important industrial sector. In addition to the presently common high speed bead mills working with particles in liquid dispersions, jet mills are also frequently used. They operate in dry disintegration mode of extreme aerosol flow with cyclonic separation of the fine fraction. The common characteristics of these both mill types is the submicron size of disintegrated output particles. Very promising alternative to these techniques is use of the disintegrating effect of cavitation implosion. In this work, we present experimental results and technical experience with a new experimental device for cavitation disintegration of microparticles and nanoparticles in dense liquid dispersions. In first test experiments, the mean size of the primary silicon particles of 125 nm was reduced to 40 nm by the cavitation disintegration lasting 200 minutes.