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Machinable Glass-ceramic vs. Calcium Fluoride

Machinable glass-ceramic belongs to the glass and glass-ceramics classification, while calcium fluoride belongs to the non-glass optical 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 machinable glass-ceramic and the bottom bar is calcium fluoride.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67
80
Knoop Hardness 250
160
Poisson's Ratio 0.29
0.26
Shear Modulus, GPa 26
34

Thermal Properties

Specific Heat Capacity, J/kg-K 790
860
Thermal Conductivity, W/m-K 1.2
9.7
Thermal Expansion, µm/m-K 21
19

Otherwise Unclassified Properties

Density, g/cm3 2.7
3.2

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 51
45
Thermal Diffusivity, mm2/s 0.56
3.5