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Infrared Transmitting Glass vs. Borosilicate Glass

Both infrared transmitting glass and borosilicate glass are glass and glass-ceramics. There are 11 material properties with values for both materials. Properties with values for just one material (17, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 18 to 63
67 to 80
Flexural Strength, MPa 20 to 79
34 to 69
Poisson's Ratio 0.28 to 0.3
0.21

Thermal Properties

Specific Heat Capacity, J/kg-K 360 to 430
830
Thermal Conductivity, W/m-K 0.0060 to 0.23
1.2
Thermal Expansion, µm/m-K 9.0 to 17
3.3 to 5.1

Otherwise Unclassified Properties

Density, g/cm3 4.4 to 4.8
2.2 to 2.6
Refractive Index 1.8 to 2.1
1.5

Common Calculations

Stiffness to Weight: Axial, points 2.3 to 7.3
15 to 17
Stiffness to Weight: Bending, points 20 to 28
55 to 61
Thermal Diffusivity, mm2/s 0.0029 to 0.14
0.54 to 0.63