Complex Permittivity of Graphite, Carbon Black and Coal ...
carbon black is observed to be around 0.2 μm, which is much smaller than the nominal particle size of 20 μm. In fact, the average particle size of the carbon black powders without an ultrasonic bath treatment is around 20 μm, as shown in Fig. 1(e). Therefore, it is considered that a carbon black particle is an agglomeration of much smaller ...
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