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Baria-alkali-silica Glass vs. Alumina

Baria-alkali-silica glass belongs to the glass and glass-ceramics classification, while alumina belongs to the 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 baria-alkali-silica glass and the bottom bar is alumina.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 3.0
3.4 to 4.1
Dielectric Constant (Relative Permittivity) At 1 Hz 7.0
8.0 to 9.0
Elastic (Young's, Tensile) Modulus, GPa 80
220 to 370
Electrical Dissipation At 1 Hz 0.0034
0.00031 to 0.0011
Electrical Dissipation At 1 MHz 0.0022
0.00049 to 0.0013
Electrical Resistivity Order of Magnitude, 10x Ω-m 12
6.2 to 14
Flexural Strength, MPa 34
260 to 430
Stiffness to Weight: Axial, points 15
35 to 53
Stiffness to Weight: Bending, points 48
57 to 62
Thermal Expansion, µm/m-K 9.5
6.7 to 8.2