Basic Study on Dispersion and Surface Modification of Diamond Powders by Sonochemical Reaction

When diamond particles are used as abrasive agents, they have to disperse homogeneously. Consequently, many dispersants have been developed to improve the dispersion property of abrasive agents. However, improvement of surface properties of abrasive agents using dispersants is not essential. We attempted an intrinsic surface modification of diamond particles used as abrasive agents by ultrasound exposure. The change of zeta potential by ultrasound exposure was confirmed. Sub-micron diamond particles with average size smaller than 0.1 mum were obtained.