Graphite Hard Felt - Shaped Pieces
Material: Polyacrylonitrile
Category: Graphite Hard Felt
Product Type: Customize various specifications and sizes (customized by drawing)
Form: Microporous
Material thickness: 5-300mm
Tube diameter: φ100-2500mm
Tube height: 100-3000mm
Tube wall thickness: 5-150mm
Operating temperature in air: < 350 ℃
Working temperature in vacuum: < 2200 ℃
Operating temperature in atmosphere: < 3000 ℃
Carbon content: above 98%
Density: 0.20-0.30g.cm3
It is mainly used in vacuum and various metallurgical industrial furnaces (single crystal growth furnace, polycrystalline casting furnace, polycrystalline reduction furnace, polycrystalline ingot furnace, high pressure gas quenching furnace, hot isostatic pressing furnace, thermal balance furnace, low pressure sinter Furnace, pressure vacuum sintering furnace, etc. It is also widely used in defense, metallurgy, chemical industry and other industries. Especially with the rapid development of polycrystalline silicon and monocrystalline silicon industries, as an ideal material for thermal insulation of high temperature furnaces, the demand for high-quality hard carbon fiber felt has reached an unprecedented height.
Polyacrylonitrile-based graphite felt is stronger and more resistant to oxidation than viscose-based graphite felt, but it has poor flexibility, large bulk density, and good thermal insulation performance. In addition to their high purity, high temperature resistance, corrosion resistance, and non-melting characteristics, they also have the advantages of elasticity, foldability, tailoring, and sewing with graphite yarn. The main use of graphite felt is as a thermal insulation material for single crystal silicon smelting furnace. In the chemical industry, it can be used as a filter material for high purity corrosive chemical reagents. Under non-oxidizing atmosphere, the temperature of graphite felt can reach 2850℃.
Physical and chemical indicators:
| main material |
PAN-CF / asphalt-CF / viscose-CF |
Sheet specifications |
length(mm) |
10-3000 |
| Bulk density(g/CM3)) |
0.22-0.28 |
width(mm) |
10-2000 |
| Thermal conductivity |
0.15-0.25(25℃)0.40-0.45(1400℃)
|
thickness(mm) |
5-300 |
|
Barrel specifications
|
diameter(Φ) |
Φ100-Φ2500 |
| Carbon content(％) |
≧99 |
Wall thickness(T) |
5-150 |
| bending strength(Gpa) |
1.5-3.2 |
Tube height |
100-3000 |
| Flexural strength(Gpa) |
1.0-2.5 |
Use environment
|
air(℃) |
≦350 |
| ash content(ppm) |
≦200 |
vacuum(℃) |
≦2200 |
| Processing temperature |
First ≧1800
Second≧2200
|
Inert atmosphere(℃) |
≦3000 |
Temperature resistance: 1800 ℃ in vacuum, 2850 ℃ in inert gas
Application:
1. Aerospace industry: hot isostatic pressing furnace, brazing, hot pressing furnace
2. Semiconductor industry: drawing silicon single crystal furnace, vacuum metallurgy
3. Metal heat treatment: heat treatment furnace, sintering furnace, brazing furnace
4. Carbon fiber production: induction heating or resistance heating carbonization furnace, graphitization furnace
Hunan MTR New Material Technology Co., Ltd. has perfect production technology and equipment, we can customize products of various sizes and shapes to meet your needs for various vacuum and high temperature furnace insulation materials. Sincerely welcome your inquiries.
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