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SiAlON vs. High-alumina Refractory

SiAlON 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 (15, in this case) are not shown.

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

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 3.3
2.1
Flexural Strength, MPa 680
28
Maximum Temperature: Mechanical, °C 1200
1200
Maximum Thermal Shock, °C 300
210
Specific Heat Capacity, J/kg-K 880
800
Thermal Conductivity, W/m-K 19
1.5
Thermal Diffusivity, mm2/s 6.4
0.87
Thermal Expansion, µm/m-K 3.6
4.3