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Infrared Transmitting Glass vs. Boron Carbide

Infrared transmitting glass belongs to the glass and glass-ceramics classification, while boron carbide belongs to the non-oxide engineering ceramics. There are 10 material properties with values for both materials. Properties with values for just one material (11, 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 infrared transmitting glass and the bottom bar is boron carbide.

Infrared Transmitting GlassBoron Carbide (B4C)
Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 4.4 to 4.8
2.1 to 2.7
Elastic (Young's, Tensile) Modulus, GPa 18 to 63
240 to 460
Flexural Strength, MPa 20 to 79
170 to 410
Poisson's Ratio 0.28 to 0.3
0.17 to 0.19
Specific Heat Capacity, J/kg-K 360 to 430
950
Stiffness to Weight: Axial, points 2.3 to 7.3
63 to 100
Stiffness to Weight: Bending, points 20 to 28
91 to 100
Thermal Conductivity, W/m-K 0.0060 to 0.23
31 to 90
Thermal Diffusivity, mm2/s 0.0029 to 0.14
16 to 38
Thermal Expansion, µm/m-K 9.0 to 17
4.5 to 5.6