A study of carbon green mix by thin sectioning

Electron microscopic studies of thin sections of industrial carbons have been extended to green mixes. Pitch is shown to have discrete spherical bodies (0.5–1.0 μ) distributed in a continuous medium. A dissolution technique is described which distinguishes the coke from the binder in a green mix. The results suggest that the coke particles have an irregular three-dimensional porous structure and the apparent inability to observe particles larger than a few microns is explained. The sectioning technique leads to morphological features comparable to those seen by replication.