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It is a mineral detail of carbon that is found in nature
mixed with rocks and, to be used, it needs a series of workmanships like
the elimination of the inerts, with physicists
and chemists processes, and also the various degrees of refinement, as
requested from the market.
The purities vary from 70 to 99.9%, while the granulometry
goes from 5 to around 2000 microns (0,005/2,00 mm).
They are distinguished in:
- crystalline said silvery or foliated (system of hexagonal
crystallization)
- amorphous
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They are used for their peculiar characteristics,
lubricating, good electric conductivity (anti-static), total resistance to
the acids, resistance to the heat, for: varnishes for foundry, produced
refractory, additive for lubricants and plastic subjects, varnishes and
products in rubber, abrasive, brushes for electric motors, metallic
sintering of dust, anti-corrosive coverings, anti-static floors, explosive,
conductive coverings, brakes and frictions, crucibles, pencils, batteries,
hi-fi etc.
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