|Specific gravity (graphite):||2.2 g/cm3|
|Specific gravity (diamond):||3.51 g/cm3|
|Specific gravity (amorphous):||1.88 g/cm3|
|m. p. sublimes:||~3550°C|
|Evaporation Temp (at which a substance has a vapor pressure of 1.33 x 10-2 mbar):||2400°C|
|Shore Scleroscope Hardness:||45|
|Resistivity Ohms-in:||4.0 x 104|
|Ash Content||<2 ppm|
|Flexural Strength:||8000 lb/in2|
Graphite is the stable form of carbon. Graphite is one of the softest; diamond is one of the hardest minerals known to man. Carbon is harder than graphite. For TEM and SEM applications, graphite is recommended.
Carbon/graphite films are most usable in TEM and SEM due to its value characteristics: uniformity amorphous and high transparent to electron beams. Because of low molecular weight and their unique structure (graphite have a sheet like structure, where the atoms all lie in a plane), carbon/graphite films have excellent mechanical stability, and even film thickness is about 1-2 nm.
Our carbon/graphite rods are CVP™ (Chemical Vapor Process) purity and spectrographic grade, grade 1, produced to ASTM tolerances or even tighter as well – we have a technical grade. The technical grade has a typical impurity level of 50ppm or greater. Technical grade may be used in applications of non critical SEM coating applications.