Why is isostatic graphite Widely praised in the materials market?

2025-09-17


Natural defects of ordinary graphite:

Ordinary graphite is composed of a layered structure, where the binding force between carbon atom layers is weak, while the bonds within each layer are exceptionally strong. This structure causes it to have "anisotropic" properties, which limits the application of ordinary graphite in precision fields.



What is isostatic graphite?

Isostatic graphite is a type of artificial specialty graphite produced by using isostatic pressing technology. Its core manufacturing principle is to uniformly apply high pressure from all directions to shape the graphite powder, thereby obtaining one of the most isotropic artificial graphite. 

Compared with other technologies, the graphite produced by this technology has several major changes:

1.The density up to 1.9g /cm³ and improved density uniformity(density deviation <0.02g /cm³).

2.Increased strength, bending strength up to 75Mpa.

3.Better thermal conductivity and uniform thermal conductivity.

4.Excellent conductivity, resistivity is only 5-10μΩ·m.

5.Excellent thermal shock resistance and low thermal expansion coefficient, at (2.5-4.5)×10⁻⁶/℃.

6.High purity: ash content content < 5 ppm.



The application of isostatic graphite

Isostatic graphite is applied in multiple different industries and occupies a large share of the market.

1. Photovoltaic: single crystal furnace thermal field system, crucible, heater, insulation cylinder, mold, graphite boat and other key components.

2. Semiconductor:  single crystal silicon growth furnace thermal field in wafer fabrication, wafer carriers in diffusion/oxidation process, electrode components of etching equipment, and susceptor for epitaxial growth.

3. Nuclear energy: core components of the fourth-generation high-temperature gas-cooled reactor (such as reflector graphite bricks, fuel balls, etc.), sealing rings and bearing components in traditional pressurized water reactors.

4. Aerospace: rocket nozzles, high temperature resistant components, etc.




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