graphite$32564$ - definizione. Che cos'è graphite$32564$
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Cosa (chi) è graphite$32564$ - definizione

MAN-MADE COMPOUND FROM CARBON
Pyrolytic graphite; Pyrolitic graphite; Pyrocarbon

Graphite         
  • Theoretically predicted [[phase diagram]] of carbon
  • Advert for Crane's Black Lead, c. 1905
  • Molar volume against pressure at room temperature
  • Graphite plates and sheets, 10–15 cm high; mineral specimen from Kimmirut, [[Baffin Island]]
  • Large graphite specimen. [[Naturalis Biodiversity Center]], [[Leiden]], Netherlands.
  • alt=Graphite pencils
  • Graphited Wood Grease 1908 ad in the Electric Railway Review
ALLOTROPE OF CARBON, MINERAL, SUBSTANCE
Natural graphite; Black Lead; Plumbago (mineral); Graphitic; Graphite electrodes; Flake graphite; Carbon electrode; Graphite foil; Graphite ink; Rhombohedral graphite
·noun Native carbon in hexagonal crystals, also foliated or granular massive, of black color and metallic luster, and so soft as to leave a trace on paper. It is used for pencils (improperly called lead pencils), for crucibles, and as a lubricator, ·etc. Often called plumbago or black lead.
Graphite         
  • Theoretically predicted [[phase diagram]] of carbon
  • Advert for Crane's Black Lead, c. 1905
  • Molar volume against pressure at room temperature
  • Graphite plates and sheets, 10–15 cm high; mineral specimen from Kimmirut, [[Baffin Island]]
  • Large graphite specimen. [[Naturalis Biodiversity Center]], [[Leiden]], Netherlands.
  • alt=Graphite pencils
  • Graphited Wood Grease 1908 ad in the Electric Railway Review
ALLOTROPE OF CARBON, MINERAL, SUBSTANCE
Natural graphite; Black Lead; Plumbago (mineral); Graphitic; Graphite electrodes; Flake graphite; Carbon electrode; Graphite foil; Graphite ink; Rhombohedral graphite
Carbon; one of three allotropic modifications of this element. It occurs in nature as a mineral. It is used as a lubricant for machinery; for commutator brushes; for making surfaces to be plated conductive, and for mixing with manganese binoxide in Leclanché cells.
Black lead         
  • Theoretically predicted [[phase diagram]] of carbon
  • Advert for Crane's Black Lead, c. 1905
  • Molar volume against pressure at room temperature
  • Graphite plates and sheets, 10–15 cm high; mineral specimen from Kimmirut, [[Baffin Island]]
  • Large graphite specimen. [[Naturalis Biodiversity Center]], [[Leiden]], Netherlands.
  • alt=Graphite pencils
  • Graphited Wood Grease 1908 ad in the Electric Railway Review
ALLOTROPE OF CARBON, MINERAL, SUBSTANCE
Natural graphite; Black Lead; Plumbago (mineral); Graphitic; Graphite electrodes; Flake graphite; Carbon electrode; Graphite foil; Graphite ink; Rhombohedral graphite
·- Plumbago; graphite. It leaves a blackish mark somewhat like lead. ·see Graphite.

Wikipedia

Pyrolytic carbon

Pyrolytic carbon is a material similar to graphite, but with some covalent bonding between its graphene sheets as a result of imperfections in its production.

Pyrolytic carbon is man-made and is thought not to be found in nature. Generally it is produced by heating a hydrocarbon nearly to its decomposition temperature, and permitting the graphite to crystalize (pyrolysis).

One method is to heat synthetic fibers in a vacuum.

It is used in high temperature applications such as missile nose cones, rocket motors, heat shields, laboratory furnaces, in graphite-reinforced plastic, coating nuclear fuel particles, and in biomedical prostheses.