Extra-Long Silicon Carbide Ceramic Tube

Technical Requirements

• Outer diameter Φ12 mm (upper deviation 0, lower deviation −0.02) is achieved by grinding.
• As the bore is not machined, uniform wall thickness over the full length is not guaranteed.
• Surface roughness of remaining surfaces: 1.6.
• Drawing material data: purity ≥99.5%; bulk density ≥3.0 g/cm³; gray-black color.
• Drawing material data: flexural strength ≥250 MPa at 20°C and ≥280 MPa at 1200°C; compressive strength 450 MPa; elastic modulus ≥280 GPa.
• Drawing material data: thermal conductivity ≥41 W/(m·K) at 1200°C; expansion coefficient recorded as “1200°C 4.5×10⁻⁶”, with no unit stated.
• Drawing material data: porosity recorded as “<0.3”, with no unit stated; hardness recorded as “9HM”.
• The drawing specifies vacuum (reaction) sintering at 1600°C and a service temperature ≤1380°C.