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● High mechanical strength
● Good thermal insulation
● Outstanding thermal stability
● High purity and low impurity content
● Excellent shock and corrosion resistance
● Long service life
Mainly used for high temperature environment under vacuum or inert gas protection, such as semiconductor crystal growth furnace, photovoltaic monocrystalline silicon / polycrystalline silicon furnace, fiber optic pre-fabricated rods and wire drawing furnace, sapphire growth furnace, high-end metal heat treatment furnace, etc.
| Performance Indicators | Units | Vulan Models | ||||
| VU-LHF-SP | VU-LHF-HP | VU-LHF-SV | VU-LHF-HV | |||
| Density | g/cm³ | 0.15-0.17 | 0.15-0.17 | 0.15-0.17 | 0.15-0.17 | |
| Carbon Content | wt | >99.9 | >99.9 | >99.9 | >99.9 | |
| Heat-Treatment Temperature | ℃ | 2200 | 2400 | 2200 | 2400 | |
| Average Thermal Conductivity 1000℃ | W/（m·K） | 0.25 | 0.23 | 0.2 | 0.2 | |
| Coefficient of Thermal Expansion1500℃ | 10-6/℃ | 3.4 | 3.2 | 3 | 2.8 | |
| Ash Content | ppm | <200 | <20 | <200 | <20 | |
| Compressive Strength | Face Direction（5%） | Mpa | 0.3 | 0.3 | 0.25 | 0.25 |
| Two-sided Direction | 1.79 | 1.77 | 1.56 | 1.56 | ||
| Bending Strength | Face Direction（5%） | Mpa | 0.395 | 0.39 | 0.35 | 0.35 |
| Two-sided Direction | 1.33 | 1.2 | 1.2 | 1.2 | ||
| Electrical Resistivity | Face Direction（5%） | Ω.m | 6.64*10-3 | 5.51*10-3 | 7.2*10-3 | 6.9*10-3 |
| Two-sided Direction | 7.22*10-4 | 6.73*10-4 | 8*10-4 | 7.6*10-4 | ||
| Usage Environment | Air | ℃ | 400 | 400 | 400 | 400 |
| Vacuum | 2400 | 2400 | 2400 | 2400 | ||
| Inert Gas | 3200 | 3200 | 3200 | 3200 | ||
| Product Description | PAN-based standard | PAN-based high-purity product | Viscose-based standard | Viscose-based high-purity product | ||
