High temperature crucibles are essential tools in various industries, especially in laboratories and manufacturing processes. They are designed to withstand extreme heat and chemical reactions.
10 Essential Materials You Should Know
1. Porcelain
Porcelain is one of the earliest materials used for crucibles. It is affordable and can withstand moderate temperatures. It is commonly used for gravimetric chemical analysis in small sizes, typically 10 to 15 ml.
2. Alumina (Aluminum Oxide, Al2O3)
Alumina is a widely used material for crucibles. It can withstand temperatures up to 1750°C. It is inert to hydrogen, carbon, and refractory metals, making it suitable for both oxidizing and reducing atmospheres.
3. Zirconia (Zirconium Oxide, ZrO2)
Zirconia is a ceramic material that tolerates very high temperatures. It is often used in crucibles for its excellent thermal stability and resistance to chemical reactions.
4. Magnesia (Magnesium Oxide, MgO)
Magnesia is another ceramic material that can withstand high temperatures. It is known for its excellent thermal stability and resistance to chemical reactions.
5. Platinum
Platinum was one of the earliest metals used for crucible making. It has a high melting point and is chemically inert, making it ideal for applications requiring resistance to corrosion and high temperatures.
6. Nickel
Nickel is a more recent addition to the materials used for crucibles. It can withstand high temperatures and is resistant to oxidation and corrosion.
7. Zirconium
Zirconium is another material chosen for its ability to withstand high temperatures and its resistance to oxidation and corrosion.
8. Fused Quartz
Fused Quartz is excellent for high-temperature applications. It is resistant to thermal shock, making it suitable for melting metals.
9. Silicon Carbide
Silicon Carbide is a durable material that can withstand high temperatures. It is often used in the production of semiconductors.
10. Boron Nitride
Boron Nitride is an excellent thermal insulator. It is used in high-temperature vacuum furnaces.
The choice of crucible material depends on the specific requirements of the application, including the temperature range, the chemical properties of the material being melted, and the need for resistance to specific chemical environments.
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