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Yttria vs. Steatite

Both yttria and steatite are 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. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

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

Metric UnitsUS Customary Units

Material Properties

Compressive (Crushing) Strength, MPa 390
540 to 620
Density, g/cm3 5.0
1.9 to 2.8
Elastic (Young's, Tensile) Modulus, GPa 120
68 to 120
Maximum Temperature: Mechanical, °C 2000
750 to 1230
Specific Heat Capacity, J/kg-K 440
850 to 860
Stiffness to Weight: Axial, points 13
14 to 32
Stiffness to Weight: Bending, points 32
52 to 83
Thermal Conductivity, W/m-K 0.3
1.8 to 2.5
Thermal Diffusivity, mm2/s 0.14
0.79 to 1.1
Thermal Expansion, µm/m-K 8.0
7.0 to 9.0