A graphite material with a high degree of preferred crystallographic orientation of the c
-axes perpendicular to the surface of the substrate, obtained by graphitization heat treatment of pyrolytic carbon or by chemical vapour deposition at temperatures above 2500 K.
'Pyrographite', a synonym for pyrolytic @G02684@, was introduced as a trademark and should not be used as a term. Hot working of pyrolytic @G02684@ (by heat treatment under compressive stress at temperatures above 3000 K) results in @H02823@ (HOPG).
PAC, 1995, 67, 473. 'Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)' on page 502 (https://doi.org/10.1351/pac199567030473)