Reaction-bonded silicon carbide cold air ducts are used in the cooling zone of roller kilns. They are resistant to rapid cooling and heating, thermal shock, and oxidation, maintaining their shape during long-term use and offering a long service life. Reaction-bonded silicon carbide (SiSiC) products possess high strength, high hardness, high wear resistance, high-temperature resistance, corrosion resistance, resistance to rapid cooling and heating, oxidation resistance, and excellent thermal shock resistance. They also exhibit good thermal conductivity and high thermal efficiency. These products are widely used in ceramic machinery, metallurgy, electronics, chemical engineering, petroleum, steel and building materials, papermaking, mining, national defense, and other fields. Main Performance Characteristics: High-temperature resistance and high strength. Below 1380°C, the high thermal conductivity and low thermal expansion of silicon carbide provide excellent thermal shock resistance. They also feature ultra-high strength and outstanding resistance to creep and stress rupture. High hardness and wear resistance. Silicon carbide is one of the hardest high-performance materials, second only to diamond, capable of withstanding severe high wear and sliding wear. Corrosion resistance, oxidation resistance, and erosion resistance. The high density, low porosity, and chemical inertness of silicon carbide allow it to be used not only in high-temperature gas and liquid environments but also in strong acids and strong alkalis under oxidizing and corrosive atmospheres.