|
|
|
|
|
NATURAL CRYSTALLINE FLAKE GRAPHITE WHICH IS
PREFERRED FOR A NUMBER OF INDUSTRIAL APPLICATIONS OWING TO ITS
UNIQUE PROPERTIES OF GRIND ABILITY & HIGH GRAPHITE CARBON
CONTENT. ONE OR MORE OF THESE PROPERTIES MAKE GRAPHITE ESSENTIAL TO
THE MANUFACTURE OF PRODUCTS IN NEARLY EVERY MAJOR
INDUSTRY. |
|
1.
LUBRICITY |
5. CARBON
SOURCE |
|
|
2.
FRICTION MODIFIER |
6. CHEMICAL
INERTNESS |
|
|
3.
ELECTRICAL CONDUCTIVITY |
7.
REFRACTORIES |
|
|
4. THERMAL CONDUCTIVITY |
|
|
|
|
|
|
|
NATURAL CRYSTALLINE GRAPHITE HAS A HARDNESS OF 1 TO
2 (MOHS SCALE) AND A SPECIFIC GRAVITY OF 2.09
TO 2.25. IT
HAS A METALLIC LUSTRE, SOMETIMES DULL OR EARTHY AND GIVES A
SILEVRY/BLACK STREAK.
OPTICALLY IT IS OPAQUE EVEN ON THE THINNEST
EDGES.IT HAS A PERFECT BASAL CLEAVAGE AND THIS COUPLED WITH
ITS EXTREME SOFTNESS GIVES IT A SLIPPERY FEEL. GRAPHITE MELTS
AT ABOUT 3650 C. AT 600-700 C IT SLOWLY DECOMPOSES IN THE PRESENCE
OF OXYGEN TO FORM CARBON DIOXIDE. LIKE SOME FORMS OF CARBON,
IT BURNS ONLY AT HIGH TEMPERATURE. STRONG OXIDENTS SUCH AS A
MIXTURE OF HOT NITRIC ACID AND POTASSIUM CHLORATE WILL
OXIDIZE IT COMPLETELY. IT IS NORMALLY UNAFFECTED BY ACIDS,
DRYCHLORINE GAS OR MOLTEN ALKALI AT LOW RED HEAT.
| |
