抄録
This study is undertaken to investigate the interaction which appears at the interface between a solid particle and its surrounding medium during crushing. The crushing experiments are carried out on alumina powder surrounded by air and liquids. The products taken from the crushing machine are dispersed in the liquid to prepare samples which can be used for the measurements of R (electric resistance) and pH in the dispersed system.
From measured data of R and pH, good knowledge about the interaction was obtained. The results were found to be as follows:
(1) In the dry crushing process, the electric resistance, R, of a dispersed system tends to decrease because of the concentration of the dissociation ions, OH-tends to increase.
(2) The electic resistance, R the wet crushing process of a dispersed system tends to increase because of the concentration of the adsorped ions on the fresh surface shows an increasing tendency.
(3) The electric resistance of a dispersed system of crushed powders closely related to the disociation and adsorption of ions in the interface between particle and medium.
