Introduction
Alumina (Al₂O₃) crucibles are widely used in thermal analysis due to their exceptional heat resistance and chemical inertness. They outperform alternatives like porcelain or nickel crucibles in extreme conditions.
Advantages of Alumina Crucibles
- High-Temperature Stability (up to 1700°C).
- Chemically Inert – Resistant to acids, alkalis, and molten salts.
- Low Thermal Expansion – Minimizes cracking during rapid heating/cooling.
Common Applications
- Thermogravimetric Analysis (TGA) – Measures mass changes at high temperatures.
- Differential Scanning Calorimetry (DSC) – Studies phase transitions.
- Ash Content Testing – Used in material science and food industries.
Maintenance & Reuse
- Clean with dilute acids or thermal decomposition at high temps.
- Inspect for cracks before reuse.
- Avoid thermal shock by gradual heating/cooling.
Conclusion
Alumina crucibles are indispensable for high-temperature experiments due to their durability and reliability. Proper handling extends their lifespan significantly.
