High Alumina, Crucible, High Form

GISCOM High Form Crucibles are premium-quality alumina vessels designed for high-temperature melting, ashing, calcination, and material testing. Their deep, high-wall structure provides increased volume handling and minimises sample loss, making them indispensable in metallurgical, chemical, and research laboratories. With exceptional thermal and chemical stability, these crucibles offer reliable performance for both routine analyses and advanced scientific applications.

Key Features

• High Form design offers greater depth and capacity for bulk samples
• Manufactured from high-purity Alumina (99%+) for accurate, contamination-free results
• Unglazed inner surface ensures stable thermal behavior and consistent analytical performance
• Withstands extremely high temperatures up to approximately 1700–1750 °C
• Excellent resistance to acids, alkalis, and corrosive chemicals
• High mechanical strength prevents cracking during rapid temperature changes
• Low porosity for reduced sample absorption and easy cleaning
• Suitable for heavy-duty laboratory and industrial applications

Material Specifications

• Material: High-purity Alumina (Al₂O₃ – 99%+)
• Thermal Properties:
  Maximum working temperature: 1700–1750 °C
   Excellent thermal shock resistance
• Chemical Properties:
   Highly inert toward most laboratory reagents
   Ideal for applications requiring contamination-free heating
• Mechanical Properties:
   High compressive and fracture strength
   Stable under prolonged high-temperature use
• Compliance:
   Produced according to international laboratory ceramicware standards (ISO / DIN guidelines)

Technical Specifications

• Available Sizes/Capacities: Multiple capacities suitable for analytical, metallurgical, and research use (custom sizes available upon request).
• Form: High form (deep cylindrical profile)
• Finish: Unglazed, smooth, low-contamination surface
• Tolerance: Precision-manufactured to maintain consistent wall thickness and dimensional accuracy
• Optional Accessories:
   Matching alumina lids
   Crucible tongs
   Furnace support plates

 Handling & Precautions

• Preheat the crucible gradually; avoid placing a room-temperature crucible directly into a hot furnace.
• Allow the crucible to cool naturally—avoid quenching or sudden temperature changes.
• Use appropriate tongs or heat-resistant gloves when handling hot crucibles.
• Clean using non-abrasive materials to protect the internal surface.
• Do not expose to sudden mechanical shock or drop on hard surfaces.
• Store in a clean, dry area to prevent contamination.

Applications

Ideal for use in:

• Metallurgy, materials science, and ceramic analysis
• Chemical and petrochemical laboratories
• Universities, R&D institutions, and advanced research centers
• Pharmaceutical QA/QC labs
• Ashing, calcination, fusion, loss-on-ignition (LOI), and high-temperature sample digestion
• Routine and specialized thermal processing in scientific workflows
  The deep, high-form structure makes it especially suitable for large samples and prolonged heating cycles.