Aggregation stability of the FeOOH-diamond and ZrO2-diamond binary disperse systems

The aggregation stability of the FeOOH-diamond and ZrO2-diamond mixed dispe rsions was studied by flow ultramicroscopy within a wide range of backgroun d electrolyte (NaCl) concentrations and pH values. It was shown that, to ex plain the observed behavior of the ZrO2-diamond binary system containing tw o hydrophilic components, it is necessary to use the concepts of the struct ural forces of repulsion arising from the overlapping of water boundary lay ers surrounding the particles. For qualitative description of the behavior of the FeOOH-diamond system containing only one hydrophilic component, we m ay confine ourselves to the consideration of the balance between the molecu lar and electrostatic forces.