Description
Carbon Planchets
Spectroscopically pure carbon Grade 1 (graphite) planchets with total impurities equal to or less than 2ppm with each single element 1ppm or less.
Trace elements can be Si, Al, Fe, Mg, Ca or B.
The carbon discs have a fine ground finish on one side; 0.80 m (32 inches).
All carbon planchets are 1.6mm (1/16″) thick. Sizes from 10 to 32mm diameter to fit all styles of SEM pin and cylinder mounts varying from 10 to 32mm diameter.
| Properties of Grade 1 Carbon | |
|---|---|
| Density | 1.58 – 1.63 g/cm |
| Hardness | 30 – 35 Shore |
| Electrical Resistivity | 58 – 71 ? m |
| Flexural Strength | 24 – 31 MPa |
| Tensile Strength | 22 MPa |
| Compressive Strength | 48 MPa |
| Thermal Expansion | 1.9 x 10-6/ C |
| Porosity | 28 – 30% |
| Purity | Impurities < 2ppm |
