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Barium Fluoride vs. Borosilicate Glass

Barium fluoride belongs to the non-glass optical ceramics classification, while borosilicate glass belongs to the glass and glass-ceramics. There are 13 material properties with values for both materials. Properties with values for just one material (16, 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 barium fluoride and the bottom bar is borosilicate glass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 60
67 to 80
Knoop Hardness 80
510
Poisson's Ratio 0.32
0.21

Thermal Properties

Melting Onset (Solidus), °C 1370
560
Specific Heat Capacity, J/kg-K 420
830
Thermal Conductivity, W/m-K 9.0
1.2
Thermal Expansion, µm/m-K 18
3.3 to 5.1

Otherwise Unclassified Properties

Density, g/cm3 4.9
2.2 to 2.6
Light Transmission Range, µm 0.15 to 13
0.3 to 2.5
Refractive Index 1.6
1.5

Common Calculations

Stiffness to Weight: Axial, points 6.8
15 to 17
Stiffness to Weight: Bending, points 27
55 to 61
Thermal Diffusivity, mm2/s 4.4
0.54 to 0.63