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SiAlON vs. Yttria

SiAlON belongs to the non-oxide engineering ceramics classification, while yttria belongs to the oxide-based engineering ceramics. There are 10 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 yttria.

Metric UnitsUS Customary Units

Material Properties

Compressive (Crushing) Strength, MPa 2620
390
Density, g/cm3 3.3
5.0
Elastic (Young's, Tensile) Modulus, GPa 290
120
Maximum Temperature: Mechanical, °C 1200
2000
Specific Heat Capacity, J/kg-K 880
440
Stiffness to Weight: Axial, points 50
13
Stiffness to Weight: Bending, points 67
32
Thermal Conductivity, W/m-K 19
0.3
Thermal Diffusivity, mm2/s 6.4
0.14
Thermal Expansion, µm/m-K 3.6
8.0