Introducing CeramXpert’s 99% Alumina Cylindrical Crucibles with Threaded Lid

Our high-purity Al₂O₃ (>99%) crucibles are precision-made using a slip-casting process, giving high density and smooth, uniform surfaces inside and out. The threaded lid offers a relatively sealed design to reduce contamination and sample loss during high-temperature experiments.

✅ Key Features:

• Continuous use up to 1600°C
• Ideal for controlled reactions, heat treatment, and research applications
• Available sizes:
  • 14 × 25 mm
  • 25 × 30 mm
  • 36 × 39 mm
  • 63.5 × 60 mm
  • 71.2 × 157.6 mm
• Material: Alumina Ceramic, 99% purity, White

💡 Important Usage Guidelines:

• Pre-dry at 105°C for 120 min before first use
• Avoid direct flame contact or rapid temperature changes
• Maintain at least 2 cm clearance from heating elements
• Controlled heating/cooling rates:
  • ≤5°C/min below 1200°C
  • ≤4°C/min above 1200°C
• Elevate large crucibles using heat-resistant plates to improve airflow and lifespan

🧪 Cleaning & Safety Tips:
Safe options:

• Deionized/distilled water for general rinsing
• Dilute HCl (≤10%) for metal oxides
• Dilute HNO₃ (≤10%) for tough metal salts
• Dilute NaOH (≤5%) for acidic organic residues

❌ Chemicals to avoid:

• Hydrofluoric acid
• Concentrated acids or bases
• Strong oxidizing organic solvents

⚠️ Note: Crucibles are relatively sealed, not fully airtight, and do not have a gasket. Sealing and heating in ambient air may create excessive internal pressure—please handle with care.

💬 If you’re interested, we can provide a quote and lead time for the size you need. Have any questions? Feel free to reach out—we’re happy to guide you on safe use and best practices.

Explore more: CeramXpert.com

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