Factors on Particle Shape Control by Dry Impact Blending Method.

Abstract

Preparation of powders of different particle shape was examined by dryimpact blending method.As a result, toner plastic powder and copper metal powder could be processedto spherical particles by several steps. But it was somewhat difficult toproduce those of inorganic calcium carbonate powder without the fine-particlegeneration.According to experimental data with copper powder of ductility, the particlesget more spherical with longer treatment time, higher peripheral speed ofa rotor and more sample charge by Hybridizer. There are some points to beimproved in relation to evaluation of particle shape by axes ratio of anequivalent ellipse of same periphery and projected area.