Graphite Plate/Sheet/Disc

Graphite Plate/Sheet/Disc refers to plate-shaped, sheet-like, or disc-shaped products made from high-purity graphite material. They exhibit excellent thermal conductivity, high temperature resistance, electrical conductivity, and chemical stability. These components are widely used as key parts such as thermal shielding in high-temperature furnaces, heating elements in semiconductor processes, bipolar plates in fuel cells, and sealing rings in mechanical applications.

Graphite Plate/Sheet/Disc Data Sheet

Purity	≥99.9%
Color	Dark Gray to Black
Chemical Formula	C
Material Grades	Natural Graphite, Synthetic Graphite, Specialty Graphite, Composites Graphite
Density	1.7–1.92 g/cm³
Maximum Operating Temperature	Up to 3000°C (in inert atmosphere)
Thermal Conductivity	100–200 W/m·K

Graphite Plate/Sheet/Disc Description

Graphite Plate/Sheet/Disc is a functional fundamental material machined from isostatically molded or die-molded high-purity graphite, featuring a distinctive two-dimensional planar structure. It demonstrates exceptional thermal conductivity and isotropic characteristics, maintaining structural stability across a wide temperature range from 500°C to 3000°C. With excellent electrical conductivity and a low thermal expansion coefficient, it serves as an ideal thermal management component and current carrier in high-temperature environments. Optional anti-oxidation coating treatment further expands its applications in oxidative atmospheres. These versatile components are extensively utilized in critical fields including semiconductor crystal growth furnace heating systems, vacuum heat treatment furnace insulation layers, fuel cell bipolar plates, EDM electrodes, and high-temperature sealing applications.

Graphite Plate Specifications

Items		Unit	Value
Grain Size		mm	0.045-4
Bulk Density		g/cm3	1.65-1.95
Resistivity		μΩ•m	8.0-11.0
Bending Strength		Mpa	18-55
Compressive Strength		Mpa	36-100
The Coefficient of Thermal Expansion (C.T.E)		×10^-6/ ℃	2.9-3.0
Ash		%	0.1-0.3
Dimensions	Length	mm	≤3050
	Width	mm	≤1200
	Height	mm	≤800

Graphite Sheet Specifications

Items		Unit	Value
Grain Size		mm	0.045-4
Bulk Density		g/cm3	1.65-1.95
Resistivity		μΩ•m	8.0-11.0
Bending Strength		Mpa	18-55
Compressive Strength		Mpa	36-100
The Coefficient of Thermal Expansion (C.T.E)		×10^-6/ ℃	2.9-3.0
Ash		%	0.1-0.3
Dimensions	Length	mm	≤3050
	Width	mm	≤1200
	Thickness	mm	0.02-5
Products can be customized as order requirements or specific drawings.

Graphite Plate/Sheet/Disc Features

High Purity & Stability：Made from high-purity graphite with stable chemical properties and corrosion resistance.
Excellent Thermal Conductivity：Outstanding in-plane heat transfer capability ensures even and efficient heat dissipation.
High Temperature Resistance：Can withstand temperatures over 2000°C for extended periods in inert or vacuum atmospheres.
Good Electrical Conductivity：Suitable for electrodes and electric heating elements.
High Machinability：Easy to cut, drill, and grind, allowing customization to various sizes and shapes.
Low Thermal Expansion Coefficient：Minimal thermal deformation and high dimensional stability, ideal for precision thermal applications.
Self-lubricating：Low friction coefficient makes it suitable for sealing and sliding components.
Optional Anti-oxidation Coating：Surface coatings can be applied to enhance service life in oxygen-containing environments.

Graphite Plate/Sheet/Disc Applications

Thermal Field & Insulation：Heaters, heat shields, and insulation boards in crystal growth furnaces and vacuum furnaces.
Electrodes & EDM：Electrodes for electrical discharge machining, electrolysis anodes, and conductive carriers.
Fuel Cell Components：Bipolar plates for PEM fuel cells.
High-Temperature Sealing & Gaskets：Seals and flange gaskets for high-temperature, high-pressure equipment.
Semiconductor & Photovoltaics：Diffusion furnace carrier plates, epitaxy susceptors, PECVD trays.
Chemical Corrosion Linings：Corrosion-resistant linings for reactors and pipelines in acid/alkali environments.
Electronic Heat Dissipation：Heat spreader substrates for high-power electronic devices.
Aerospace：High-temperature structural parts and thermal protection components.

Graphite Ceramic Packaging

Graphite ceramic products are typically packaged in vacuum-sealed bags to prevent moisture or contamination and wrapped with foam to cushion vibrations and impacts during transport, ensuring the quality of products in their original condition.

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FAQ

What is Graphite Plate/Sheet/Disc? What are its common forms?

It is a plate, sheet, or disc-shaped material made from high-purity graphite, with thickness ranging from 0.5mm to over 100mm, customizable as square plates, round discs, or custom shapes.

What are the key advantages of graphite plates/sheets?

Key advantages include high temperature resistance (up to 3000°C in vacuum), excellent thermal/electrical conductivity, low thermal expansion, easy machinability, and chemical corrosion resistance.

Can it be used in high-temperature vacuum environments? Does it require coating?

Yes, it is ideal for high-temperature vacuum applications. Anti-oxidation coatings (e.g., SiC, Al₂O₃) are recommended in oxidizing atmospheres to extend service life.

What is the difference between purity grades (e.g., high-purity, isostatic pressed)?

High-purity graphite (≥99.9%) offers better corrosion resistance; isostatic pressed graphite has more uniform structure and higher strength, suitable for precision thermal systems.

How is it used as bipolar plates in fuel cells?

Its conductivity, gas tightness, and corrosion resistance allow it to be machined with flow channels for PEMFCs, requiring controlled thickness and surface resistivity.

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