Alkali-Lime-Silica Glass
Alkali-lime-silica glass is a glass-type material.
The properties of alkali-lime-silica glass include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare alkali-lime-silica glass to other glass and glass-ceramics (top) and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Thermal Properties
Glass Transition Temperature
530 °C 990 °F
Thermal Expansion
9.0 µm/m-K
Electrical Properties
Dielectric Constant (Relative Permittivity) At 1 Hz
7.1 to 7.5
Dielectric Strength (Breakdown Potential)
28 kV/mm 1.1 V/mil
Electrical Dissipation At 1 Hz
0.022 to 0.052
Electrical Dissipation At 1 MHz
0.0088 to 0.053
Electrical Resistivity Order of Magnitude
10 10x Ω-m
Other Material Properties
Density
2.7 g/cm3 170 lb/ft3
Elastic (Young's, Tensile) Modulus
78 GPa 11 x 106 psi
Flexural Strength
34 to 170 MPa 5.0 to 25 x 103 psi
Common Calculations
Stiffness to Weight: Axial
16 points
Stiffness to Weight: Bending
53 points
Followup Questions
Further Reading
Glass: Mechanics and Technology, Eric Le Bourhis, 2007
IEC 60672-3: Ceramic and glass-insulating materials - Part 3: Specifications for individual materials