Note: This is a variation of Dense Ceramics – Alumina, Mullite, & Zirconia (3200ºF – 3600ºF Range).

Fully Dense Porcelain, Mullite, Alumina, Zirconia, Silicon Carbide, and Tungsten Carbide are gas-tight high-fired ceramics capable of withstanding operating temperatures of 2550ºF (1400ºC) to 3182ºF (1750ºC). These compositions are available in the forms of extruded and cast tubing, rods, plates, fish spine beads, lab ware, and custom molded shapes.


CompositionDirect Sintered Silicon Carbide
Density ( g/cc )3.15
Average Crystal Size ( Microns )5
Gas Permeability0
Flexural Strength (MOR) at 20ºC ( MPa )480
Flexural Strength (MOR) at 20ºC ( psi )70 x 103
Elastic Modulus at 20ºC ( psi )59 x 103
Elastic Modulus at 20ºC ( GPa )410
Poisson's Ratio at 20ºC0.21
Compressive Strength at 20ºC ( MPa )3500
Compressive Strength at 20ºC ( psi )507
Knoop Hardness at 1000gm ( kg/mm² )2800
Knoop Hardness at 1000gm ( GPa )27.5
Fracture Toughness K(Ic)4 to 5 MPa m1/2
Thermal Conductivity at 20ºC ( W/m-ºK )150.0
Coefficient of Thermal Expansion at 25-1000ºC ( Per ºC )4.4 x 10-6
Thermal Shock Resistance ΔTc ( ºC )300
Maximum Use Temperature ( ºC )1750
Volume Resistivity at 25ºC ( ohm-cm )>105
Volume Resistivity at 500ºC ( ohm-cm )<103
Volume Resistivity at 1000ºC ( ohm-cm )<103
Water Absorption ( % )0
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