Properties of Carbon
| 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.
Spectro-Grade Carbon Rods (graphite) have an impurity level of 2ppm or less with a maximum level element of each of 1 ppm. These rods are ideal for all TEM, SEM and all other critical applications.