A pyrolytic graphite block is a high-performance, ultra-pure carbon material produced through chemical vapor deposition (CVD) of hydrocarbon gases at high temperatures onto a substrate. Unlike conventional graphite, pyrolytic graphite features a layered, anisotropic crystalline structure, resulting in extremely high thermal conductivity in the planar direction, exceptional chemical purity, and strong resistance to high temperatures.
This advanced material is widely used in semiconductors, aerospace, medical devices, nuclear research, and thermal management systems due to its unique thermal, electrical, and mechanical properties.
Key Features:
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Ultra-High Purity: Typically ≥ 99.999% carbon, ideal for ultra-clean and high-vacuum environments
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Extreme Thermal Conductivity: Up to 1700 W/m·K in-plane (better than copper); excellent heat spreader
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Anisotropic Properties: High thermal and electrical conductivity in-plane; low conductivity through-thickness
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Non-Porous & Chemically Inert: Impermeable to gases; highly resistant to acids, alkalis, and corrosive environments
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High Temperature Stability: Performs reliably at up to 2500°C in inert or vacuum atmospheres
Typical Applications:
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Semiconductor & Electronics: Heat spreaders, wafer handling tools, and ion implantation components
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Aerospace & Defense: Radiation shielding, satellite heat sinks, and propulsion systems
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Medical & Analytical Instruments: MRI RF shielding and X-ray devices
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Nuclear Research: Neutron moderators and reflectors due to its low atomic number and high purity
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Crystal Growth (e.g., LED, sapphire): Crucibles, thermal insulation, and susceptor components
Technical Specifications (Typical):
| Property | In-Plane | Through-Plane |
|---|---|---|
| Thermal Conductivity | 1000–1700 W/m·K | 5–15 W/m·K |
| Electrical Resistivity | ~20 µΩ·cm | ~1000 µΩ·cm |
| Density | 2.20 g/cm³ | Uniform |
| Purity (Carbon Content) | ≥ 99.999% | |
| Coefficient of Thermal Expansion | ~1 × 10⁻⁶ /K (in-plane) | ~25 × 10⁻⁶ /K (through) |
| Maximum Operating Temp. | Up to 2500°C (inert) | |
| Grain Structure | Highly oriented (anisotropic) |
Available Formats:
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Block Sizes:
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100 × 100 × 10 mm
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150 × 150 × 25 mm
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Custom sizes available on request
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Grades:
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PG (standard pyrolytic graphite)
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HOPG (Highly Oriented Pyrolytic Graphite) – superior for research-grade applications
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Handling & Storage:
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Store in a clean, dry, non-corrosive environment
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Avoid excessive mechanical stress due to brittleness in the perpendicular direction
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Use gloves during handling to prevent contamination
