Compared with other materials, graphite products have the following advantages:
1. High temperature stability: Graphite has good high temperature stability, which can maintain structural stability and physical and chemical stability in high temperature environments. In contrast, many metals are prone to melting, deformation, or oxidation at high temperatures, while other non-metallic materials such as plastics and ceramics are also prone to losing strength or deformation at high temperatures. Therefore, in high-temperature environments, graphite products are often used as refractory materials for high-temperature equipment, such as graphite electrodes, graphite furnaces, etc.
2. Conductivity: Graphite has excellent conductivity and is a material in nature with conductivity second only to metals. Graphite has better conductivity in the direction perpendicular to the crystal plane than in other directions, so it is often used to manufacture conductive materials such as graphite electrodes and graphite powders. Compared to metals, graphite has slightly lower electrical conductivity but lower electrical resistivity and higher corrosion resistance.
3. Thermal conductivity: Graphite has good thermal conductivity, can quickly conduct heat, and has a high thermal conductivity coefficient. In contrast, other non-metallic materials such as plastic and rubber have poorer thermal conductivity. Therefore, graphite products are often used as thermal conductive materials, such as graphite thermal conductive sheets, graphite heat exchangers, etc.
4. Chemical stability: Graphite has good chemical stability and can maintain stability in most chemical substances. In contrast, metal materials are prone to oxidation and corrosion, while most non-metallic materials such as plastics and rubber are also prone to dissolution, expansion, and loss of performance in specific chemicals. Therefore, graphite products have a wide range of applications in some chemical industries and corrosive environments, such as graphite tanks, graphite pipes, graphite discs, etc.
5. Low friction coefficient: Graphite has a low friction coefficient and a smooth surface. This makes graphite products have good performance in many friction and wear environments. In contrast, metal materials have higher surface smoothness and friction coefficient, making them prone to wear, while non-metallic materials such as plastics and rubber are prone to electrical friction, leading to problems such as charge separation and electrostatic accumulation. Therefore, graphite is often used as a friction material, such as graphite brushes, graphite bearings, etc.
6. Processing performance: Graphite has good processing performance and is easy to process into various shapes of products. Graphite has relatively high brittleness, but due to its layered structure, it is easy to perform machining operations such as cutting, carving, and milling. In contrast, metal materials are more difficult to perform flexible machining, while non-metallic materials such as plastics and rubber are more difficult to perform high-precision and high-speed cutting machining. Therefore, graphite products are often used as materials for mechanical processing, such as graphite cutting tools, graphite molds, etc.
7. Lightweight and High Strength: Graphite has lower density and higher strength. The density of graphite is approximately 2.2 g/cm 3, while metals typically have higher densities, and non-metallic materials such as plastics and rubber also have relatively higher densities. Although graphite exhibits high brittleness in its layered structure, it has high tensile and compressive strength when the brittle fiber structure fractures. Therefore, graphite products have a high strength to weight ratio and are often used to manufacture lightweight structures
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