Carbon crucibles, particularly high-purity graphite crucibles, can withstand extremely high temperatures.
The maximum temperature for a high-purity graphite crucible is up to 3000 degrees Celsius (5472 degrees Fahrenheit).
This high temperature tolerance makes graphite crucibles ideal for melting metals like aluminum, copper, and brass.
Using graphite crucibles ensures there is no risk of contamination or damage due to heat stress.
Understanding the Properties of Graphite Crucibles
1. High Thermal Conductivity
Graphite crucibles are designed with high thermal conductivity.
This property is crucial for handling high temperatures effectively.
2. Non-Wetability
Non-wetability is another key feature of graphite crucibles.
This prevents metal contamination during high-temperature applications.
3. High Carbon Content
The high carbon content in graphite crucibles contributes to their thermal shock resistance.
This makes them suitable for applications where temperatures fluctuate rapidly, such as in foundry operations.
4. Lids for Temperature Control
Graphite crucibles often come with lids that lock in place during use.
These lids help maintain even temperatures and facilitate quick cooling of the molten material after use.
Handling and Maintenance Tips
1. Careful Handling
It is important to handle graphite crucibles with care.
Use properly fitting tongs to prevent damage.
2. Pre-Tempering
Pre-tempering the crucible by heating it to about 500 degrees Fahrenheit and allowing it to cool slowly can remove any moisture.
This prepares the crucible for use.
3. Preventing Contamination
Use different crucibles for different metals.
Ensure the crucible is completely emptied after each use to prevent contamination and damage from metal expansion during re-heating.
Continue Exploring, Consult Our Experts
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