Silicon carbide (SiC) ceramic crucibles have become a leader in high-temperature materials, particularly for molten metal applications. Their performance characteristics include:

Excellent hardness and wear resistance:

With a Mohs hardness of 9.5, silicon carbide is one of the hardest materials known, even harder than corundum and just behind diamond, cubic boron nitride, and boron carbide. This extraordinary hardness translates into excellent wear resistance, making silicon carbide crucibles ideal for withstanding the abrasion and erosion caused by molten metals.

Excellent thermal conductivity:

Silicon carbide has an impressive thermal conductivity of 120W/m•K, even higher than many metals. This exceptional property enables silicon carbide crucibles to transfer heat efficiently, ensuring uniform melting and preventing local overheating.

High-temperature stability:

Silicon carbide exhibits excellent stability at high temperatures, maintaining its structural integrity and mechanical strength even under extreme thermal conditions. This property makes silicon carbide crucibles suitable for applications requiring high-temperature performance, such as melting aluminum, copper, and other metals.

Excellent Corrosion Resistance:

Silicon carbide has a strong resistance to chemical corrosion, making it immune to the corrosive effects of molten metals and their associated fluxes. This property ensures that the silicon carbide crucible maintains its integrity and performance during long-term use.

The excellent performance of silicon carbide ceramic crucibles has led to their widespread adoption in various industries, including: