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Description
| Name: | Carbon |
| Symbol: | C |
| Atomic number: | 6 |
| Atomic weight: | 12.0107 |
| Group number: | :14 |
| Period number | 2 |
| CAS I.D: | 7440-44-0 |
| Block: | p-block |
| 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 |
| Boiling point: | 4200°C |
| Evaporation Temp (at which a substance has a vapor pressure of 1.33 x 10-2 mbar): | 2400°C |
| Density: | 1.85 g/cc |
| Shore Scleroscope Hardness: | 45 |
| Resistivity Ohms-in: | 4.0 x 104 |
| Ash Content | <2 ppm |
| Flexural Strength: | 8000 lb/in2 |
| Porosity: | 16.5% |
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.
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