- Collections
Carbon rods, spectro-grade
Graphite is the stable form of carbon and one of the softest minerals. In contrast, diamond is one of the hardest known minerals. It is important to note that carbon itself is harder than graphite. Graphite is recommended for transmission electron microscopy (TEM) and scanning electron microscopy (SEM) applications.
Carbon/graphite films are most usable in TEM and SEM due to their value characteristics: uniformity, amorphous and high transparency to electron beams. Because of their low molecular weight and unique structure (graphite has 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 - 2nm.
These carbon/graphite rods are CVP (Chemical Vapour Process) purity and spectrographic grade, Grade 1, produced to ASTM tolerances, or even tighter, as we also 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.
Properties:
| 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) | 2.2g/cm3 |
| Specific gravity (diamond) | 3.51g/cm3 |
| Specific gravity (amorphous) | 1.88g/cm3 |
| m. p. sublimes | ~3550°C |
| Boiling point | 4200°C |
| Evaporation Temp (at which a substance has a vapour pressure of 1.33 x 10-2 mbar) | 2400°C |
| Density | 1.85g/cc |
| Shore Scleroscope Hardness | 45 |
| Resistivity Ohms-in | 4.0 x 104 |
| Ash Content | <2 ppm |
| Flexural Strength | 8000 lb/in2 |
| Porosity | 16.5% |
* Ordering Schedule
This item is available for back-order where 0 stock is listed.
We order from this manufacturer weekly, with an estimated lead time of 4 weeks.
This is the estimated lead time, based on the average time taken previously to fill orders from this particular supplier.
Lead times are from when we receive your order until when we fill your order. For delivery times, please see shipping information below.
