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Alumina-lime-silica Glass vs. High-silica Glass

Both alumina-lime-silica glass and high-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 high-silica glass.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

Glass Transition Temperature, °C 680
650 to 800
Thermal Expansion, µm/m-K 4.3
0.6 to 0.75

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 6.5
3.8
Dielectric Strength (Breakdown Potential), kV/mm 34
34
Electrical Dissipation At 1 Hz 0.0022
0.00044 to 0.00087
Electrical Dissipation At 1 MHz 0.0026
0.00044 to 0.00088
Electrical Resistivity Order of Magnitude, 10x Ω-m 12
12

Otherwise Unclassified Properties

Density, g/cm3 2.8
2.4

Common Calculations

Stiffness to Weight: Axial, points 18
19
Stiffness to Weight: Bending, points 53
61