Product Information:
Single-spiral silicon carbide rods are non-metallic heating elements made from high-purity silicon carbide through a high-temperature recrystallization sintering process. The heating section features a continuous spiral groove on the surface, while the cold ends have the same diameter as the heating section or are slightly enlarged. The spiral structure increases the surface area of the heating section, resulting in higher thermal radiation efficiency, while also facilitating atmosphere circulation in the furnace and uniform temperature distribution. The lead-out ends can be connected with aluminum braid or metal clamps, offering low contact resistance, reliable electrical connection, and easy replacement and maintenance. Under high-temperature oxidizing atmospheres, a quartz protective film forms on the surface, significantly extending the service life.
Performance Parameters:
SiC Content: ≥98%; Apparent Porosity: 20%–22%; Thermal Expansion Coefficient: approx. 4.8×10⁻⁶/°C; Straightness: ≤0.2%; Bulk Density: 2.6–2.8 g/cm³; Flexural Strength at Room Temperature: ≥40 MPa; Electrical Resistivity: 0.08–0.1 Ω·cm; Resistance Value Deviation: ±10%; Maximum Operating Temperature: 1600°C.
Product Dimensions:
Common diameter range: 10–60 mm; cold ends have the same diameter as the heating section or are slightly enlarged. Manufacturable heating section length: approx. 150–2400 mm; cold end length: approx. 100–800 mm; overall element length: approx. 350–4000 mm. Thread specifications are customized according to customer requirements. Orders are expressed as “Diameter × Heating Section Length × Cold End Length × Thread Specification.” Yuko Corporation can produce according to customer requirements and drawings.
Product Applications:
Widely used in box furnaces, bogie hearth furnaces, tube furnaces, muffle furnaces, tunnel kilns, roller kilns, elevator furnaces, and various laboratory electric furnaces. As heating elements, they provide a stable and controllable high-temperature heat source for processes such as sintering and heat treatment.