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- Pyrolytic Graphite
- Carbon Felt / Graphite Felt
Pyrolytic Graphite Blocks
BZNCarbon supplies high-quality Pyrolytic Graphite Blocks and rods with stable performance and superior crystallinity. Our product range includes PG grade and HOPG grade options, designed to meet the needs of high-performance industries.
Description
What is Pyrolytic Graphite?
Pyrolytic graphite is a highly anisotropic carbon material formed via chemical vapor deposition (CVD) of hydrocarbon gases onto a graphite substrate at 1800–2000°C under controlled pressure. The result is a material with extremely high purity (impurities < 0.0002%), high density, and strong directional thermal and electrical conductivity.
Key Properties of Pyrolytic Graphite (PG Grade)
| Property | Value | Direction |
|---|---|---|
| Density | 2.18–2.20 g/cm³ | — |
| Compressive Strength | 83.6 MPa | AB plane |
| Tensile Strength | 75 MPa | AB plane |
| Ash Content | 0.02–0.005% | — |
| Thermal Conductivity | 300–400 W/m·K | AB plane |
| 3.5–5 W/m·K | C axis | |
| Coefficient of Thermal Expansion (CTE) | 3.2 ×10⁻⁶ /°C | AB plane |
| 17–26 ×10⁻⁶ /°C | C axis | |
| Specific Resistance | 2 ×10⁻⁴ Ω·cm | AB plane |
| 0.6 Ω·cm | C axis | |
| Carbon Layer Spacing (002) | ≤ 3.42 Å | — |
| Air Impermeability | He transmissivity < 10⁻¹⁰ cm² | — |
Available Sizes
Dia 90×5 mm
90×90×5 mm
90×200×5 mm
Max width: 180 mm
Max length: 800 mm
Max thickness: 10 mm
Applications
Due to its excellent purity, thermal stability, anisotropy, and vacuum compatibility, pyrolytic graphite is widely used in:
Semiconductors (substrates, heat spreaders)
Vacuum electronics
Aerospace thermal shielding
Medical radiation shielding
Nuclear energy systems
High-end optics and photonics
Neutron moderator materials
Graphite hot zones and insulation
