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Mullite vs. Yttria

Both mullite and yttria are oxide-based engineering ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.

For each property being compared, the top bar is mullite and the bottom bar is yttria.

Metric UnitsUS Customary Units

Material Properties

Compressive (Crushing) Strength, MPa 800
390
Density, g/cm3 2.7 to 3.0
5.0
Elastic (Young's, Tensile) Modulus, GPa 110 to 170
120
Maximum Temperature: Mechanical, °C 1680
2000
Specific Heat Capacity, J/kg-K 950
440
Stiffness to Weight: Axial, points 22 to 31
13
Stiffness to Weight: Bending, points 58 to 62
32
Thermal Conductivity, W/m-K 3.5 to 11
0.3
Thermal Diffusivity, mm2/s 1.4 to 3.7
0.14
Thermal Expansion, µm/m-K 5.8
8.0