Black silicon carbide (SiC) is a highly effective refractory material due to its exceptional thermal, mechanical, and chemical properties. It is widely used in high-temperature applications where resistance to thermal shock, abrasion, and corrosion is critical.
Key Properties of Black Silicon Carbide as a Refractory Material:
High Thermal Conductivity
SiC efficiently dissipates heat, reducing thermal stress in refractory linings.
、Low thermal expansion coefficient prevents cracking under rapid temperature changes.
Superior Mechanical Strength
High hardness (Mohs ~9.5) and compressive strength make it resistant to wear and erosion.
Chemical Inertness
Resists attack from acids, alkalis, and molten metals (except strong oxidizing agents at very high temperatures).
High Melting Point (~2,700°C)
Suitable for extreme environments like furnaces, kilns, and incinerators.
Oxidation Resistance (up to ~1,500°C)
Forms a protective SiO₂ layer in oxidizing atmospheres, slowing further degradation.
Applications in Refractory Industries:
Furnace Linings (blast furnaces, induction furnaces)
Kiln Furniture (supports, setters, saggers)
Steel & Foundry Refractories (ladles, tundishes)
Non-ferrous Metal Processing (aluminum, copper smelting)
Incinerators & Chemical Reactors
Refractory Bricks & Monolithics