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Alumina-lime-silica Glass vs. Alkali-lime-silica Glass

Both alumina-lime-silica glass and alkali-lime-silica glass are glass and glass-ceramics.

For each property being compared, the top bar is alumina-lime-silica glass and the bottom bar is alkali-lime-silica glass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 90
78
Flexural Strength, MPa 46
34 to 170

Thermal Properties

Glass Transition Temperature, °C 680
530
Thermal Expansion, µm/m-K 4.3
9.0

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 6.5
7.1 to 7.5
Dielectric Strength (Breakdown Potential), kV/mm 34
28
Electrical Dissipation At 1 Hz 0.0022
0.022 to 0.052
Electrical Dissipation At 1 MHz 0.0026
0.0088 to 0.053
Electrical Resistivity Order of Magnitude, 10x Ω-m 12
10

Otherwise Unclassified Properties

Density, g/cm3 2.8
2.7

Common Calculations

Stiffness to Weight: Axial, points 18
16
Stiffness to Weight: Bending, points 53
53