99% Alumina Arc-Shaped Corundum Crucible with Window and Lid 500 mL

This Arc-Shaped Corundum Crucible with Window and Lid is made from high-purity alumina (Al₂O₃ > 99%) using a slip-casting process, ensuring high density, smooth surfaces, and excellent thermal stability. Designed for long-term use at temperatures up to 1600°C, it is ideal for laboratory and industrial applications requiring high-temperature material analysis or melting processes.

Package: 1 piece per pack

Specifications

• Product Name: Arc-Shaped Crucible with Window and Lid

• Material: 99% Alumina (Al₂O₃)

• Volume: 500 mL

• Total Height: 115 mm

• Top Diameter: 100 mm

• Bottom Diameter: 60 mm

• Wall Thickness: 5.5 mm

• Lid Dimensions: Ø100 × 9 mm

• Manufacturing Process: Slip Casting / Press Casting

• Firing Temperature: 1800°C

• Operating Temperature: 1600°C

Applications

• Suitable for laboratory and industrial analysis of metal and non-metal samples

• Ideal for melting, high-temperature testing, and thermal processing

• Designed for arc-shaped furnaces and applications requiring controlled heating

Usage Precautions for 99% Alumina Crucibles

1. Pre-drying: Before first use, place the crucible in an oven at approximately 105°C for 2 hours to remove moisture.

2. Avoid Direct Flame: Do not heat directly with gasoline, acetylene, or alcohol torches to prevent cracking from uneven heat.

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

4. Controlled Heating/Cooling:

   • Below 1200°C: ≤ 5°C per minute

   • Above 1200°C: ≤ 4°C per minute

   • Use controlled power cooling; avoid sudden shutdown at high temperatures to prevent thermal shock.

5. For Large Crucibles: Avoid direct contact with the furnace floor. Use high-temperature-resistant supports (e.g., corundum plates) to improve air circulation and extend lifespan.