99 Alumina Bottomless Crucible | Open-Ended Design | High-Temperature Resistant up to 1600°C | Customizable

This Alumina Bottomless Crucible is made from high-purity Al₂O₃ (>99%) using a precision slip-casting process, ensuring high density and exceptionally smooth interior and exterior surfaces. Designed for long-term use at temperatures up to 1600°C, it offers excellent resistance to thermal shock, corrosion, and chemical wear.

Ideal for high-temperature material processing, sample analysis, and laboratory research, the bottomless design allows for improved airflow and efficient heating in specialized applications.

Package: 1 piece per pack

Product Details

• Product Name: Open-Ended Alumina Crucible

• Material: 99% Alumina (Al₂O₃)

• Outer Dimensions: 200 × 200 × 85 mm

• Wall Thickness: 8 mm

• Production Method: Slip Casting / Press Casting

• Firing Temperature: 1800°C

• Operating Temperature: 1600°C

• Applications: Suitable for laboratory and industrial analysis of metals, non-metals, and melting experiments.

⚙️ Note: Maintain heating/cooling rates below 4°C per minute, especially for large crucibles.

Precautions for Using 99% Alumina Crucibles

1. Pre-drying: Before first use, heat the crucible at approximately 105°C for 120 minutes to remove moisture.

2. Avoid direct flame: Do not use gasoline, acetylene, or alcohol torches to prevent uneven heating and cracking.

3. Maintain clearance: Keep at least 2 cm between the crucible and heating elements (e.g., carbon tubes, SiC rods, heating wires).

4. Temperature control:

   • Below 1200°C: ≤5°C/min

   • Above 1200°C: ≤4°C/min

   • Avoid abrupt temperature changes or immediate power-off cooling.

5. Proper placement: For large crucibles, avoid direct contact with the furnace floor. Use corundum plates or supports to enhance air circulation and extend lifespan.