Graphite comes in various forms, each with unique properties and manufacturing processes.
Two common types are extruded graphite and isostatic graphite.
Understanding their differences can help you choose the right material for your needs.
5 Key Points to Know About Extruded and Isostatic Graphite
1. Manufacturing Process
Extruded graphite is made through an extrusion process.
In this process, raw graphite material is forced through a die to create the desired shape.
Isostatic graphite, on the other hand, is produced using a cold isostatic pressing (CIP) method.
Here, the raw material mixture is compressed into rectangular or round blocks using a cold isostatic press.
2. Grain Size and Strength
Extruded graphite typically has a coarser grain size and lower strength compared to isostatic graphite.
Isostatic graphite is known for its ultra-fine grain size and excellent mechanical properties, making it stronger than extruded graphite.
3. Thermal and Electrical Conductivity
Extruded graphite excels in thermal and electrical conductivity.
This makes it ideal for applications like electrical components and thermal management systems.
Isostatic graphite, while not as conductive, offers superior resistance to thermal shock and high temperatures.
4. Mechanical Properties
Isostatic graphite is preferred for applications requiring high mechanical properties due to its fine grain size and high strength.
Extruded graphite, though less strong, is still useful in applications where high conductivity is crucial.
5. Resistance and Purity
Isostatic graphite exhibits superior resistance to thermal shock, high temperature, and oxidation.
It also has low electrical resistance, good corrosion resistance, and precise machining capabilities.
Additionally, it can be produced with very high purity.
Extruded graphite, while less resistant in some aspects, still offers high thermal and electrical conductivity.
Continue exploring, consult our experts
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