Cylindrical Alumina Crucible with Top Holes High-Temperature Resistant & Customizable

This Cylindrical Alumina Crucible with Top Holes features drilled top holes and is manufactured 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 suitable for laboratory and industrial applications requiring precise thermal control.

Package: 1 piece per pack

Specifications

• Product Name: Cylindrical Crucible with Top Hole

• Material: 99% Alumina (Al₂O₃)

• Outer Dimensions (D × H): 110 × 195 mm

• Top Hole Diameter: 8 mm

• Distance from Hole to Top Edge: 22 mm

• Wall Thickness: 6 mm

• Manufacturing Process: Slip Casting / Press Casting

• Firing Temperature: 1800°C

• Operating Temperature: 1600°C

Applications

• Laboratory and industrial analysis of metals and non-metal samples

• Melting and high-temperature processing

• Customizable configurations for specific furnace setups and experiments

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 due to uneven heating.

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 airflow and extend lifespan.