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Lead-alkali-silica Glass vs. C-820 Magnesia Ceramic

Lead-alkali-silica glass belongs to the glass and glass-ceramics classification, while C-820 magnesia ceramic belongs to the oxide-based engineering ceramics. There are 8 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is lead-alkali-silica glass and the bottom bar is C-820 magnesia ceramic.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 3.1
2.7
Dielectric Constant (Relative Permittivity) At 1 Hz 7.0
10
Elastic (Young's, Tensile) Modulus, GPa 67
100
Electrical Dissipation At 1 MHz 0.0018
0.00030
Flexural Strength, MPa 34
53
Stiffness to Weight: Axial, points 12
21
Stiffness to Weight: Bending, points 43
58
Thermal Expansion, µm/m-K 9.0
11