This series of ceramic crucibles is designed for high-temperature melting and sintering, offering two material systems: high-purity quartz and high-purity alumina. Selection and customization can be based on process temperature, media corrosiveness, thermal shock strength, and service life requirements.

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Selected Materials

High-quality fused quartz or high-purity alumina raw materials combined with proven ceramic processing deliver stable performance and better batch consistency.

Dense, Smooth Surface

High-temperature firing forms a dense surface that resists sticking and spalling, improving durability under thermal shock.

Stable Supply

Standard sizes are supplied consistently, with material selection (fused quartz / alumina) and size customization available.

High-Purity Quartz Ceramic Crucible

• Temperature rating: <= 1680 C
• Chemical composition: SiO2 >= 99.86%

High-Purity Alumina Ceramic Crucible

• Temperature rating: <= 1650 C / 1750 C (by grade)
• Material system: mullite (Al2O3 about 60-70%) / corundum (Al2O3 about 99%)

• Low thermal conductivity and low heat capacity: fast heat-up with lower furnace heat storage loss
• Low thermal expansion coefficient: dimensional stability and high product accuracy
• Good thermal shock resistance: withstands rapid heating/cooling with less cracking or spalling
• Chemical resistance: suitable for a range of molten media and high-temperature atmospheres
• Reliable structural strength: dense forming with stable wear and compressive strength
• Dense smooth surface: less sticking, less spalling, easy to clean

Melting and holding of silicon, aluminum, copper, and more; optical and specialty glass; polysilicon production; non-ferrous metallurgy; powder sintering; electronic components; automotive parts; aerospace; machine tools and hydraulic parts; high-temperature processes for pumps, valves, and fans.

When used to hold molten material, ceramic crucibles typically require stable continuous operation for 50+ hours at about 1650 C / 1680 C / 1750 C. Final selection should be based on furnace type, temperature profile, media corrosiveness, and charging method.