2013 Volume 50 Issue 9 Pages 632-639
The use of vibrations and an external electric field for triboelectrically charging particles has been studied both theoretically and experimentally. The condenser model was applied to formulate particle charging caused by repeated contact with a surface. In this experiment, particles were fed from the top of an inclined vibration plate. The particles could travel on the surface, and they were then dropped from the plate. The charge on the particles was measured using a Faraday cup. It was found that the particle charge depends on the inclination angle, electrode length, electric field strength, vibration direction, and material type. The experimental results agreed well with the theoretical results, showing that this method is suitable for characterizing and controlling the particle charge.
