Partitioned Alumina Square Boat Crucible (3 Compartments), 99% Al₂O₃

This Partitioned Alumina Square Boat is expertly crafted with three isolated compartments, providing efficient sample separation for various high-temperature applications. Made from high-purity alumina (Al₂O₃ > 99%) through a slip-casting process, it boasts high density and smooth, even surfaces for reliable performance in demanding environments.

Designed for long-term use at temperatures up to 1600°C, this crucible offers excellent thermal stability, making it ideal for applications that require precise temperature control.

Package: 1 piece per pack

Specifications

• Material: 99% Alumina (Al₂O₃)

• Number of Compartments: 3

• Outer Dimensions (L × W × H): 80*82*23mm

• Firing Temperature: 1800°C

• Operating Temperature: 1600°C

Applications

Perfect for metal and non-metal sample analysis, as well as melting and thermal processing in laboratory and industrial settings.

Usage Precautions for 99% Alumina Crucibles

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

2. Avoid Direct Flame: Do not use gasoline torches, acetylene torches, or alcohol lamps for direct heating to prevent cracking from uneven heat distribution.

3. Keep Distance from Heating Elements: Maintain at least a 2 cm gap between the crucible and heating elements (such as carbon tubes, SiC rods, or heating wires).

4. Control Heating/Cooling Rate:

   • Below 1200°C: ≤ 5°C per minute

   • Above 1200°C: ≤ 4°C per minute

   • Use controlled power cooling to avoid rapid cooling and cracking.

5. For Large Crucibles: Place the crucible on high-temperature-resistant materials, like corundum plates, to elevate it and promote air convection, which helps extend the crucible’s lifespan and ensures uniform heating.