Abstract
ABSTRACT Natural graphite, with a high degree of crystallinity, is a very difficult material to be ground finely because of its high lubrication property, and its tendency to slip between lamellar structured layers. Dry grinding with the graphite was carried out using an attrition mill with different degrees of vacuum, and the size distribution and shapes of the ground particles were investigated in various grinding conditions. It was found that the grinding efficiency of the graphite was highly improved, and the submicron sized particles were obtained within reasonably short periods of time. The flaky graphite powders of approximately 0.8μm median size were easily prepared by the modified milling system in three hours.
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