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Alkali-lime-silica Glass vs. Lead-alkali-silica Glass

Both alkali-lime-silica glass and lead-alkali-silica glass are glass and glass-ceramics. There are 11 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 78
67
Flexural Strength, MPa 34 to 170
34

Thermal Properties

Glass Transition Temperature, °C 530
450
Thermal Expansion, µm/m-K 9.0
9.0

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 7.1 to 7.5
7.0
Electrical Dissipation At 1 Hz 0.022 to 0.052
0.0024
Electrical Dissipation At 1 MHz 0.0088 to 0.053
0.0018
Electrical Resistivity Order of Magnitude, 10x Ω-m 10
12

Otherwise Unclassified Properties

Density, g/cm3 2.7
3.1

Common Calculations

Stiffness to Weight: Axial, points 16
12
Stiffness to Weight: Bending, points 53
43