Observation of pearl chain formation of dielectric particles under an electric field using digital microscope
Date
2010
Authors
Otsuki, A.
Sagawa, T.
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Conference paper
Citation
Chemeca 2010 proceedings: engineering at the edge, 2010, pp.2568-2577
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Engineering at the Edge (26 Sep 2010 - 29 Sep 2010 : Adelaide, Australia)
Abstract
The objective of this study is to develop an in situ method for observing pearl chain formations of dielectric particles under an electric field by using a microscope technique. The intended experiments by digital microscopy in this study focused on the behaviour of particles under the electric field created between two electrodes with a narrow gap, which results from the use of different dielectric particles (alumina, silica and titanium dioxide) and solid concentrations. A sample cell was first developed for observation. Then, experimental conditions (electric field strength and solid concentrations) were determined by calculation of dielectric polarization force and gravitational force. Finally, pearl chain formations of dielectric alumina particles under an electric field were successfully observed at 0.1 vol% solid.
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Copyright 2010 Engineers Australia