An extremely well graphitizing carbon with a high degree of optical anisotropy (isochromatic areas of optical texture above about 100 µm) and which is characterized by a combination of the following properties which differ significantly from those of regular coke: high real density, low reversible thermal expansion and low ash content combined, in most cases, with low sulfur content.
Note:
Premium @C01142@ is mainly produced from tars or residues from petrochemistry by the @D01578@. Also, refined @C01121@ are used as precursors for premium @C01142@ production.
Source:
PAC, 1995, 67, 473. 'Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)' on page 501 (https://doi.org/10.1351/pac199567030473)