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C-820 Magnesia Ceramic vs. Synthetic Sapphire

Both C-820 magnesia ceramic and synthetic sapphire are oxide-based engineering ceramics. There are 10 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 C-820 magnesia ceramic and the bottom bar is synthetic sapphire.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 2.7
4.0
Dielectric Constant (Relative Permittivity) At 1 MHz 9.6
10
Elastic (Young's, Tensile) Modulus, GPa 100
450
Flexural Strength, MPa 53
1090
Specific Heat Capacity, J/kg-K 950
760
Stiffness to Weight: Axial, points 21
63
Stiffness to Weight: Bending, points 58
64
Thermal Conductivity, W/m-K 8.0
30
Thermal Diffusivity, mm2/s 3.1
9.9
Thermal Expansion, µm/m-K 11
5.3