Cokes used as fillers for graphite electrodes are heterogeneous materials exhibiting at least three predominate structures as determined by scanning electron microscope techniques. A detailed set of definitions has been prepared to illustrate the terminology used in describing the morphology of cokes. Each definition is accompanied by a photomicrograph and the structures are ranked in order of decreasing usefulness to the electrode manufacturer. Several commercially available cokes are then characterized according to this scheme. © 1989.
Pysz, R. W., Hoff, S. L., & Heintz, E. A. (1989). Terminology for the structural evaluation of coke via scanning electron microscopy. Carbon, 27(6), 935–944. https://doi.org/10.1016/0008-6223(89)90045-6