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Mullite vs. Infrared Transmitting Glass

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

For each property being compared, the top bar is mullite and the bottom bar is infrared transmitting glass.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 2.7 to 3.0
4.4 to 4.8
Elastic (Young's, Tensile) Modulus, GPa 110 to 170
18 to 63
Flexural Strength, MPa 130 to 160
20 to 79
Poisson's Ratio 0.25
0.28 to 0.3
Specific Heat Capacity, J/kg-K 950
360 to 430
Stiffness to Weight: Axial, points 22 to 31
2.3 to 7.3
Stiffness to Weight: Bending, points 58 to 62
20 to 28
Thermal Conductivity, W/m-K 3.5 to 11
0.0060 to 0.23
Thermal Diffusivity, mm2/s 1.4 to 3.7
0.0029 to 0.14
Thermal Expansion, µm/m-K 5.8
9.0 to 17