Ceramic crucibles are high-temperature containers made of ceramic materials. They have the characteristics of high temperature resistance, good chemical stability, and small thermal expansion coefficient. They are widely used in metal smelting, glass manufacturing, semiconductor production, and material science.
- Main materials and types
Alumina Crucible
Features: high temperature resistance (1650℃-1800℃), chemical corrosion resistance, high mechanical strength.
Application: Melting high temperature alloys, non-ferrous metals and precious metals.
Quartz Crucible
Features: high purity (SiO₂ content ≥99.9%), high temperature resistance (below 1450℃), good thermal shock resistance.
Applications: semiconductor single crystal silicon pulling, optical glass melting.
Boron Nitride Crucible
Features: high temperature resistance (above 1800℃), good thermal conductivity, excellent chemical stability.
Application: semiconductor manufacturing, high temperature smelting.
Silicon Carbide Crucible
Features: high hardness, corrosion resistance, and good thermal stability.
Applications: molten metal processing, high temperature reactions.
Zirconia Crucible
Features: high temperature resistance (2700℃), chemical corrosion resistance.
Application: Smelting of platinum group precious metals and their alloys.
- Application fields
Metal smelting
Used for smelting high-temperature alloys, non-ferrous metals and precious metals, such as smelting copper and aluminum in alumina crucibles.
Glass Manufacturing
Processing of special glass, electronic glass and optical glass, such as quartz crucibles for high-purity glass melting.
Semiconductor Manufacturing
Boron nitride crucibles are used in high-temperature processes in the manufacture of electronic components such as printed circuit boards.
Materials Science
Used for high temperature experiments, material synthesis and analysis, such as the application of silicon carbide crucible in molten metal processing.
- Technical Features
High temperature resistance
It can withstand high temperatures above 1000°C, and some materials (such as zirconium oxide) have a melting point of 2700°C.
Chemical stability
It is resistant to corrosion by acids, alkalis and molten metals, and avoids the introduction of impurities.
Thermal stability
The thermal expansion coefficient is small, the thermal shock resistance is good, and cracking is avoided at high temperature.
Mechanical strength
High-strength materials such as alumina can withstand mechanical shock and extend service life.
- Manufacturing process
Raw material selection
Select high-purity ceramic raw materials such as alumina, quartz sand, etc. according to application requirements.
Molding process
Some crucibles require surface treatment through pressing, slip casting or isostatic pressing.
Firing
Firing in a high-temperature kiln ensures the density and performance of the ceramic material.
Quality Inspection
Test purity, density, thermal expansion coefficient and other indicators to ensure that the product meets the standards.
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