Abstract
We have studied the specific surface area, shape, and size of fine particles of isotropic and needle cokes and isotropic graphite. The results demonstrate that, as the average particle size is reduced from 1000 to 1.5 μm, the BET specific surface area of the powders increases from 0.1 to 100 m2/g, exceeding the geometric surface area of the particles by a factor of 40–60. The particle size distributions of the coke and graphite powders produced under identical milling conditions are similar to one another and can be represented by the Rosin-Rammler equation. The anisometry of the powder particles is higher at a stronger microtexture of the starting material and decreases with decreasing particle size.
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