Silicon Carbide vs. High-alumina Refractory

Silicon carbide belongs to the non-oxide engineering ceramics classification, while high-alumina refractory belongs to the oxide-based engineering ceramics. There are 8 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is silicon carbide and the bottom bar is high-alumina refractory.

Silicon Carbide (SiC)High-Alumina Refractory (IEC 60672 Type C-510)

Metric UnitsUS Customary Units

Material Properties

Density, g/cm³		3.0 to 3.2
Density, g/cm³		2.1

Flexural Strength, MPa		410 to 600
Flexural Strength, MPa		28

Maximum Temperature: Mechanical, °C		500 to 1590
Maximum Temperature: Mechanical, °C		1200

Maximum Thermal Shock, °C		210 to 660
Maximum Thermal Shock, °C		210

Specific Heat Capacity, J/kg-K		670 to 1180
Specific Heat Capacity, J/kg-K		800

Thermal Conductivity, W/m-K		120 to 170
Thermal Conductivity, W/m-K		1.5

Thermal Diffusivity, mm²/s		38 to 79
Thermal Diffusivity, mm²/s		0.87

Thermal Expansion, µm/m-K		4.0 to 4.5
Thermal Expansion, µm/m-K		4.3

Silicon Carbide vs. High-alumina Refractory

Material Properties

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