Tech Team · Kintek Solution

The density of isostatic graphite typically ranges between 1.75 to 1.85 g/cm³, depending on the specific grade and manufacturing process. This material is known for its uniform structure, high strength, and excellent thermal and electrical properties, which make it ideal for demanding applications in industries such as semiconductors, aerospace, and metallurgy. The density is a critical property that contributes to its mechanical strength, thermal conductivity, and overall performance in high-temperature and corrosive environments.

Key Points Explained:

1. Density Range of Isostatic Graphite:

   • The density of isostatic graphite typically falls within the range of 1.75 to 1.85 g/cm³. This range is a result of the material's ultra-fine grain structure and the isostatic molding process, which ensures uniform compression and density throughout the material.
   • The density is influenced by factors such as the raw materials used, the pressing pressure during isostatic molding, and the graphitization process.

2. Importance of Density in Isostatic Graphite:

   • Mechanical Strength: Higher density correlates with increased mechanical strength, making the material suitable for applications requiring durability and resistance to deformation.
   • Thermal Conductivity: Density also affects thermal conductivity, with higher-density graphite exhibiting better heat transfer properties.
   • Electrical Conductivity: The uniform density ensures consistent electrical conductivity, which is crucial for applications in electronics and semiconductor manufacturing.

3. Manufacturing Process and Density:

   • The production of isostatic graphite involves several stages, including coke production, pulverizing, kneading, isostatic pressing, carbonizing, and graphitizing. The isostatic pressing step, in particular, ensures uniform density by applying equal pressure from all directions.
   • After pressing, the material undergoes high-temperature graphitization, which further enhances its density and structural integrity.

4. Applications Influenced by Density:

   • Semiconductor Industry: The high density and purity of isostatic graphite make it ideal for use in semiconductor manufacturing, where consistent performance and resistance to thermal shock are critical.
   • Aerospace and Metallurgy: In these industries, the material's density contributes to its ability to withstand extreme temperatures and corrosive environments.
   • EDM (Electrical Discharge Machining): The uniform density and ease of machining make isostatic graphite a preferred material for EDM electrodes.

5. Comparison with Other Graphite Types:

   • Isostatic graphite's density is generally higher than that of extruded or molded graphite, which typically ranges from 1.5 to 1.7 g/cm³. This difference is due to the isostatic pressing process, which eliminates directional weaknesses and ensures a more uniform structure.
   • The lack of a preferred molding direction in isostatic graphite means that its properties, including density, are consistent regardless of orientation.

6. Factors Affecting Density:

   • Raw Material Quality: The purity and grain size of the raw materials used in production can influence the final density.
   • Pressing Pressure: Higher pressures during isostatic pressing result in denser material.
   • Graphitization Temperature: The temperature and duration of the graphitization process also play a role in determining the final density.

In summary, the density of isostatic graphite is a key property that underpins its exceptional mechanical, thermal, and electrical performance. Its uniform structure, achieved through isostatic molding, ensures consistent density and makes it a versatile material for high-performance applications across various industries.

Summary Table:

Property	Details
Density Range	1.75–1.85 g/cm³
Key Features	Uniform structure, high strength, excellent thermal/electrical properties
Applications	Semiconductors, aerospace, metallurgy, EDM electrodes
Factors Affecting Density	Raw material quality, pressing pressure, graphitization temperature

Interested in high-performance isostatic graphite for your industry? Contact us today to learn more!