Advantages of Graphite Rods Compared to Impregnated Graphite

Pressed graphite tubes and rods are made by mixing graphite powder with various binders in a specific ratio, then kneading, pressing (hot extrusion or cold forming), or high-temperature heat treatment. These can be used for manufacturing pipes, sheets, fittings, valves, pumps, and also as wear-resistant materials, bushings, mechanical seals, and piston rings. Graphite rods have several advantages over impregnated graphite:

1. Simplified Production Method: The production process is relatively simplified, and broken graphite can be used to produce graphite products, reducing costs.
2. Low Porosity: They have a uniform arrangement structure and good permeability.
3. Dense and Smooth Shape: After forming, they are dense and shiny, requiring no further processing except for the connecting ends.
4. Lower Thermal Conductivity: They have a lower thermal conductivity than impregnated graphite and a larger coefficient of linear expansion.
5. Excellent Properties: They exhibit excellent chemical stability, thermal conductivity, electrical conductivity, heat resistance, thermal stability, and high mechanical strength.