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Steatite vs. Infrared Transmitting Glass

Steatite belongs to the oxide-based engineering ceramics classification, while infrared transmitting glass belongs to the glass and glass-ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (14, 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 steatite and the bottom bar is infrared transmitting glass.

SteatiteInfrared Transmitting Glass
Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 1.9 to 2.8
4.4 to 4.8
Elastic (Young's, Tensile) Modulus, GPa 68 to 120
18 to 63
Flexural Strength, MPa 32 to 150
20 to 79
Poisson's Ratio 0.23
0.28 to 0.3
Specific Heat Capacity, J/kg-K 850 to 860
360 to 430
Stiffness to Weight: Axial, points 14 to 32
2.3 to 7.3
Stiffness to Weight: Bending, points 52 to 83
20 to 28
Thermal Conductivity, W/m-K 1.8 to 2.5
0.0060 to 0.23
Thermal Diffusivity, mm2/s 0.79 to 1.1
0.0029 to 0.14
Thermal Expansion, µm/m-K 7.0 to 9.0
9.0 to 17