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Optical Silicon vs. Baria-alkali-silica Glass

Optical silicon belongs to the non-glass optical ceramics classification, while baria-alkali-silica glass belongs to the glass and glass-ceramics. There are 6 material properties with values for both materials. Properties with values for just one material (22, in this case) are not shown.

For each property being compared, the top bar is optical silicon and the bottom bar is baria-alkali-silica glass.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 2.3
3.0
Elastic (Young's, Tensile) Modulus, GPa 150
80
Flexural Strength, MPa 300
34
Stiffness to Weight: Axial, points 35
15
Stiffness to Weight: Bending, points 75
48
Thermal Expansion, µm/m-K 3.0
9.5