Carbon felt and graphite felt is an ideal material for high temperature insulation in vacuum furnaces and inert gas furnaces. The needle-punched PAN based carbon and graphite felt is light in weight and has low thermal conductivity.
Carbon and graphite felt can be used in oxidizing temperatures up to 400 °C and in vacuum or protective atmospheres up to 3200 °C. Rayon Based and PAN Based felt are available.
| Property | Carbon Felt | Graphite Felt |
|---|---|---|
| Bulk density (g/cm³) | 0.14 | 0.13 |
| Carbon content (%) | 98.5 | > 99.5 |
| Ash content (%) | 0.75 | 0.05 |
| Thermal conductivity (W/mK) (at 1150 °C) | 0.12 | 0.16 |
| Tensile strength (MPa) | 0.18 | 0.12 |
| Min. Process Temperature (°C) | 1500 | 2400 |
| Thickness (mm) | 3, 5, 8, 10, 12 | 5, 8, 10, 12 |
| Width (mm) | 1000 - 1300 | 1000 - 1300 |
| Length (m) | 9 - 15 | 9 - 15 |
| Property | Carbon Felt | Graphite Felt |
|---|---|---|
| Bulk density (g/cm³) | 0.12 | 0.09 |
| Carbon content (%) | ≥ 99 | ≥ 99.5 |
| Ash content (%) | ≤ 0.05 | ≤ 0.01 |
| Thermal conductivity (W/mK) (at 1150 °C) | 0.11 | 0.14 |
| Tensile strength (MPa) | 0.13 | 0.10 |
| Min. Process Temperature (°C) | 1400 | 2200 - 2500 |
| Thickness (mm) | 3, 5, 8, 10, 12 | 5, 8, 10, 12 |
| Width (mm) | 1000 - 1300 | 1000 - 1300 |
| Length (m) | 9 - 15 | 9 - 15 |