Product Description
1. Overview
Alumina crucibles are formed from high-purity alumina powder and sintered above 1600°C, giving a dense, strong body. With Al2O3 above 99%, their chemical stability far exceeds ordinary porcelain, allowing duty at higher temperatures and in harsher media.
Continuous duty is rated to 1400°C with short excursions to 1650°C. They tolerate common fluxes such as sodium carbonate and sodium peroxide, and are widely used for fusion of refractory ores, high-temperature sintering and small-scale crystal growth.
Hard and wear-resistant yet more brittle than porcelain, alumina crucibles should be protected from knocks and rapid cooling. Choosing a generous capacity margin extends service life.
🔬 Types & Features:
1650°C — far above porcelain, for demanding duty.
Al2O3 ≥99% — broad flux tolerance.
Shock resistant — survives rapid temperature swings.
High hardness — wear-resistant, dimensionally stable.
2. Key Parameters
- Material: high-purity alumina (Al2O3 ≥99%)
- Capacity: 5 / 10 / 15 / 20 / 30 / 50 / 100 mL
- Continuous temperature: ≤1400°C
- Short-term maximum: 1650°C
- Corrosion: tolerates most acids, alkalis and fluxes
- Forbidden: hydrofluoric acid, phosphoric acid, wet alkali
3. Material & Workmanship
Made from high-purity alumina micro-powder, isostatically pressed and sintered at high temperature for low porosity. Each batch is dimensionally inspected for stable performance in demanding duty.
Versus porcelain: alumina handles higher temperature and broader chemistry at a higher unit price. Use porcelain for routine ignition and alumina below 1600°C for demanding work.
