Graphite is a crystalline form of carbon with a unique layered atomic structure that gives it exceptional properties for industrial applications. For manufacturers looking to sell on Alibaba.com, understanding these properties is critical to matching the right graphite configuration with buyer requirements.
The three defining characteristics of graphite that drive B2B procurement decisions are temperature resistance, self-lubricating properties, and electrical/thermal conductivity. Each property opens different application scenarios and buyer segments.
Graphite Material Properties: Technical Specifications
| Property | Value/Range | Industry Significance | Key Applications |
|---|---|---|---|
| Melting Point | 3927°C (7101°F) | Highest among commercial materials | Refractories, crucibles, furnace components |
| Operating Temperature | -73°C to 454°C (-100°F to 850°F) | Wide range for industrial use | Automotive, aerospace, manufacturing |
| Thermal Conductivity | 80-100 W/mK (standard), up to 4180 W/mK (theoretical) | Excellent heat dissipation | Heat exchangers, thermal management |
| Electrical Conductivity | High (metallic range) | Suitable for electrical applications | Electrodes, battery components, EMI shielding |
| Coefficient of Thermal Expansion | 3.5-5.5 × 10⁻⁶/°C | Low expansion ensures dimensional stability | Precision components, nuclear applications |
| Bulk Density | ≥1.7 g/cm³ | Indicates material quality and purity | All industrial applications |
| Ash Content | 300-1000 ppm | Lower ash = higher purity | Nuclear, semiconductor, high-end applications |
| Self-Lubricating | Yes (layered structure) | No external lubricant needed | Bearings, seals, sliding components |
Why does graphite self-lubricate? The answer lies in its atomic structure. Graphite consists of carbon atoms arranged in hexagonal layers held together by weak van der Waals forces. These layers can slide over each other with minimal friction, creating natural lubrication without requiring external oils or greases. This property is particularly valuable in high-temperature environments where conventional lubricants would degrade or evaporate.
Graphite has a layered structure in which the carbon atoms are arranged in hexagonal layers. The layers are held together by weak van der Waals forces, which allow them to slide over each other easily. This is what gives graphite its lubricating properties. Graphene, on the other hand, is a single layer of graphite and does not have this lubricating property because there are no layers to slide [3].
