1. High temperature resistance:
The melting point of graphite bearings is 3850±50℃ and the boiling point is 4250℃. Even after ultra-high temperature arc burning, the weight loss is very small and the thermal expansion coefficient is also very small. The strength of graphite increases as the temperature increases. At 2000°C, the strength of graphite doubles.
2. Electrical conductivity and thermal conductivity:
The electrical conductivity of graphite bearings is one hundred times higher than that of ordinary non-metallic minerals. Thermal conductivity exceeds that of steel, iron, lead and other metal materials. The thermal conductivity decreases as the temperature increases, and even at extremely high temperatures, graphite becomes a thermal insulator. Graphite can conduct electricity because each carbon atom in graphite only forms 3 covalent bonds with other carbon atoms, and each carbon atom still retains 1 free electron to transmit charge.
3. Lubricity:
The lubrication performance of graphite bearings depends on the size of graphite flakes. The larger the scales, the smaller the friction coefficient and the better the lubrication performance.
4. Chemical stability:
Graphite bearings have good chemical stability at room temperature and are resistant to acid, alkali and organic solvent corrosion.
5. Plasticity:
Graphite bearings have good toughness and can be rolled into very thin sheets.
6. Thermal shock resistance:
When used at room temperature, graphite bearings can withstand drastic changes in temperature without being damaged. When the temperature suddenly changes, the volume of graphite does not change much and will not cause cracks.
Graphite is a special material in the 21st century. The processing of graphite bearings has further opened up the application fields of graphite. We look forward to the emergence of more sophisticated technologies in the graphite industry!