Graphite hard felt is rigid high-temperature thermal insulation material with compact structure. It possesses low thermal conductivity, superior heat resistance and great thermal-shock stability. Resistant to corrosion, it performs well under vacuum and inert-gas conditions. Featuring high mechanical strength and good shape retention, it resists deformation at extreme temperatures. Easy for cutting and custom fabrication, it is widely applied in vacuum furnaces, sintering furnaces and various high-temperature thermal processing equipment.
| ITEM | High-temperature products | High-purity products | |||
| Hard composite carbon fiber felt (graphite foil-based) | Hard composite carbon fiber felt (carbon cloth based) | Hard composite graphite fiber felt (graphite foil-based) | Hard composite graphite fiber felt (carbon cloth based) | ||
Bulk density (g/cm3) | 0.25~0.30 | 0.25~0.30 | 0.25~0.28 | 0.25~0.28 | |
| Carbon (%) | ≥98 | ≥98 | ≥99 | ≥99 | |
| Thermal conductivity (1150°C) W/mk | 0.25~0.35 | 0.25~0.35 | 0.20~0.30 | 0.20~0.30 | |
| Folding Strength (MPa) | 1.5~3.2 | 1.8~3.4 | 1.3~3.0 | 1.75~3.2 | |
| Flexural strength (MPa) | 1.0~2.5 | 1.5~3.0 | 1.0~2.5 | 1.5~3.0 | |
| Crushing stress at 5% compression (MPa) | 0.6 | 0.8 | 0.4 | 0.7 | |
| Ash (PPm) | ≤500 | ≤500 | ≤200 | ≤200 | |
| Processing temperature (°C) | 1800 | 1800 | 2500 | 2500 | |
| OperatingCondition | in the air (°C) | ≤400 | ≤400 | ≤400 | ≤400 |
| in the vacuum (°C) | ≥1800 | ≥1800 | ≥2200 | ≥2200 | |
| Board Spec | Wide (mm) | 1000、1300 | 1000、1300 | 1000、1300 | 1000、1300 |
| High (mm) | 20-250 | 20-250 | 20-250 | 20-250 | |
| Tube materialsSpec | diam (mm) | ||||
| Wall thickness(mm) | 30-130 | 30-130 | 30-130 | 30-130 | |
| High (mm) | 300-3000 | 300-3000 | 300-3000 | 300-3000 | |
The cured felt/hard composite felt is made from carbon fiber felt and is prepared through a reasonable composite process. The main body of the cured felt/hard composite felt is a laminated and overall felt. Different coating processes can be applied on the surface according to requirements to meet various application needs. Compared to carbon fiber soft felt, it has better ease of use, higher strength, and longer service life, etc
Shuangjing Village, Ligezhuang Town, Jiaozhou City, Qingdao City, Shandong Province, China
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