Features of obtaining finely dispersed powders of molybdenum and tungsten diselenides by grinding in centrifugal planetary mills

The results of investigations into the dry grinding of tungsten and molybdenum diselenide powders in a planetary centrifugal mill are presented. It is shown that their efficient grinding occurs only for first 3 min of treatment. As the duration of the process increases, the equilibrium between dispersing the particles and their aggregation, which manifests itself in the absence of a rise of the specific surface of the powder, is attained. The best results of dispersion are attained at the mill filling coefficient of 0.7 and the mass ratio of the balls and material of 3 : 1.