Terminology for the structural evaluation of coke via scanning electron microscopy

Abstract

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.