Graphite blocks possess several unique properties that make them valuable in various industrial applications. These properties arise from the structure and characteristics of graphite, a form of carbon with each carbon atom bonded to three others in flat, hexagonal layers. Here are some key properties of graphite blocks:
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High Thermal Conductivity: Graphite is an excellent conductor of heat. The hexagonal arrangement of carbon atoms allows for efficient heat transfer within the material. This property makes graphite blocks suitable for applications where thermal management is crucial, such as in the manufacturing of crucibles, as mentioned in the previous response.
High Electrical Conductivity: Similar to its thermal conductivity, graphite exhibits high electrical conductivity. This property is exploited in applications where electrical conductivity is essential, such as in electrodes for electric arc furnaces, electrical discharge machining (EDM), and other electrical applications.
Lubricating Properties: The layered structure of graphite also gives it lubricating properties. The weak forces between the layers allow them to slide over each other easily. This self-lubricating characteristic makes graphite blocks suitable for applications where reduced friction and wear are essential, such as in certain types of bearings and seals.
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Chemical Inertness: Graphite is chemically inert, meaning it does not easily react with other substances. This property makes graphite blocks resistant to corrosion and degradation in harsh chemical environments. It is commonly used in applications involving corrosive chemicals, including as a lining material for chemical reactors and as a component in certain types of gaskets and seals.
High Melting Point: Graphite has an exceptionally high melting point, around 3,500 degrees Celsius (6,332 degrees Fahrenheit). This high melting point makes graphite blocks suitable for use in high-temperature applications, such as in the production of crucibles and as a structural material in high-temperature furnaces.
Low Thermal Expansion: Graphite exhibits low thermal expansion, meaning it does not significantly change in volume with changes in temperature. This property is valuable in applications where dimensional stability is crucial, such as in molds and dies used in high-temperature processes.
Mechanical Strength: While not as strong as some metals or ceramics, graphite blocks have sufficient mechanical strength for many applications. They can withstand compressive and shear forces and are often used in structural components for high-temperature environments.
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Lightweight: Graphite is a lightweight material. Its low density makes graphite blocks suitable for applications where weight is a critical factor, such as in aerospace components and certain types of structural elements.
Good Machinability: Graphite is relatively easy to machine, allowing for the production of complex shapes and precision components. This property enhances its versatility in various manufacturing processes.
Non-Toxic and Biocompatible: Graphite is generally non-toxic and biocompatible, making it suitable for certain medical and biotechnological applications. For example, graphite is used in some medical implants and diagnostic devices.
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In summary, graphite blocks offer a combination of thermal conductivity, electrical conductivity, lubricating properties, chemical inertness, high melting point, low thermal expansion, mechanical strength, lightweight, machinability, and biocompatibility. These properties make graphite blocks valuable in a diverse range of industries, including metallurgy, electronics, aerospace, chemical processing, and more.
Graphite block has excellent thermal stability, excellent electrical conductivity, and strong mechanical strength.
These unique properties allow our graphite blocks to be used for casting, metallurgy, silicon carbide, graphitization, chemical heat exchangers.
Production types
Depending on the production process, there are four types.
Isostatic pressing, molding, extrusion, vibration.
Properties of graphite blocks
High thermal conductivity coefficient. It can be used as a casting mold, it is easy to cool and cools quickly, and the casting can be taken out quickly.
The coefficient of linear expansion is small, and under extremely hot and cold conditions, the shape and size of the castings change very little, maintaining accuracy.
With self-lubricating properties, it can be used without lubricants and ensures the smoothness of the metal surface.
It is not easy to react with the molten metal and is inert to non-ferrous metals. Graphite blocks are often used for casting molds for non-ferrous metals such as copper.
It has high mechanical strength. Under high temperature conditions, the strength becomes higher as the temperature increases.
Graphite blocks have good machining performance and can be processed into various complex shapes.
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