Silicon Carbide Graphite Crucible for High-Temperature Metal Melting
The silicon carbide graphite crucible is designed for high-temperature melting, offering excellent thermal conductivity, strength, and resistance to oxidation and corrosion.
The silicon carbide graphite crucible is designed for high-temperature metal melting, offering excellent thermal conductivity, strong oxidation resistance, and durability. It ensures uniform heating, fast melting, and reliable performance, making it ideal for non-ferrous metal processing in industrial applications.
Product Features
physical indicators
The silicon carbide graphite crucible features a bulk density of 2.21–2.25 g/cm³, providing a strong and stable structure with excellent load-bearing capacity. Its apparent porosity of 9–12% ensures a balanced combination of strength and thermal insulation, enhancing durability during repeated heating cycles.
With a modulus of rupture ranging from 8–12 MPa, the crucible offers high mechanical strength and resistance to cracking under thermal stress. The low thermal expansion coefficient of 3.0–4.5 × 10⁻⁶ K⁻¹ minimizes deformation, ensuring dimensional stability at elevated temperatures.
Its electrical resistivity remains stable across temperature variations, while high thermal conductivity—140–150 W/(m·K) at 25°C and 40–50 W/(m·K) at 800°C—enables efficient heat transfer, supporting fast and uniform melting performance in high-temperature applications.
Chemical indicators
The silicon carbide graphite crucible is formulated with 37–42% free carbon and 35–40% silicon carbide, creating a balanced composition that delivers excellent thermal and chemical performance in high-temperature environments.
The high free carbon content enhances thermal conductivity and improves resistance to thermal shock, allowing the crucible to withstand rapid heating and cooling without cracking. It also contributes to smooth heat transfer, ensuring efficient and uniform melting.
The silicon carbide component provides outstanding oxidation resistance, mechanical strength, and structural stability at elevated temperatures. It forms a protective layer that helps reduce material degradation and extends service life under continuous operation.
This optimized chemical composition ensures strong resistance to corrosion from molten metals and slags, while maintaining durability and performance in demanding industrial applications such as non-ferrous metal melting and casting processes.
