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What are the Isostatic Graphite Properties ?

Carbon Graphite Products

Isostatic graphite, a novel material, is the product of isostatic pressing techniques, hence the name – isostatically pressed graphite. Using petroleum coke as the primary raw material, it is compacted into round or rectangular shapes in a cold isostatic press. When utilized in precision applications, isostatic graphite – a highly machinable, fine-grained variant of synthetic graphite – exhibits outstanding attributes.

What are the properties of isostatic graphite?

It has high-temperature resistance, high purity, stable size at high temperatures, and good thermal shock resistance.
Graphite is resistant to high temperatures and begins to oxidize at around 450 degrees Celsius in the air. If used at high temperatures, it must be placed in a vacuum.
The purity is high, the ash content generally does not exceed 0.1%, and it can reach 0.001% after special treatment.
The linear expansion coefficient is low and will not be distorted after being degassed at high temperatures.

What are they used for?

Isostatic graphite’s excellent wear resistance and low thermal expansion make it ideal for electronic and semiconductor processes requiring extremely high precision. In addition, its resistivity remains constant with increasing temperature. Its compressive strength makes it especially suitable for the harshest thermal environments. This makes it an ideal material for the production of high-performance components in industries such as aerospace, chemical processing, and metal production.


Isostatic graphite for the semiconductor industry-Jinsun Carbon

Application of isostatic graphite in industry and aerospace

In the aerospace field, as a structural material for an aircraft, it should have the characteristics of lightweight, high strength, and high rigidity. Isostatic graphite is a functional material that can reduce the weight of spacecraft. In addition, it has excellent fatigue, corrosion, and damage resistance, thus maintaining the shape and precision of aerospace components. More importantly, graphite is highly machinable, and manufacturers can process it into any form to meet demand.

The manufacturing process of isostatic graphite

Isostatic graphite production begins with prebaked petroleum coke, loaded into a furnace and roasted using a specific temperature, pressure, and chemical process. Firing cycles are often long, requiring multiple dips to reach the target temperature. Further impregnations and treatments during the firing cycle can add additional capabilities, such as chemical resistance or high-temperature strength.

How to identify high-quality graphite

Identifying high-quality graphite can be daunting due to the various grades and types available. You must evaluate graphite based on several factors, including strength, machinability, and lubricating qualities. It would help if you also consider factors such as grind ability, bulk density, and ash content of a particular grade. Purchasing higher graphite grades is often beneficial for applications requiring higher performance levels or longer life cycles. Determining whether a specific type of graphite is suitable for a particular application requires a technician’s judgment on the material. They can help compare various products and find the best option.

In future

As research and development continue to drive advances in materials science, isostatic graphite is expected to find even more diverse and complex applications in emerging technologies. The future of isostatic graphite holds the potential for enhanced energy storage, technological innovation, sustainability, and space exploration.