Alumina-Lime-Silica Glass (IEC 60672 Type G-400)
Alumina-lime-silica glass is a glass-type material. It has a moderately high density among the glass and glass-ceramics in the database. The graph bars on the material properties cards below compare alumina-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
680 °C 1250 °F
Thermal Expansion
4.3 µm/m-K
Electrical Properties
Dielectric Constant (Relative Permittivity) At 1 Hz
6.5
Dielectric Strength (Breakdown Potential)
34 kV/mm 1.3 V/mil
Electrical Dissipation At 1 Hz
0.0022
Electrical Dissipation At 1 MHz
0.0026
Electrical Resistivity Order of Magnitude
12 10x Ω-m
Other Material Properties
Density
2.8 g/cm3 170 lb/ft3
Elastic (Young's, Tensile) Modulus
90 GPa 13 x 106 psi
Flexural Strength
46 MPa 6.6 x 103 psi
Common Calculations
Stiffness to Weight: Axial
18 points
Stiffness to Weight: Bending
53 points
Followup Questions
Further Reading
Glass: Mechanics and Technology, Eric Le Bourhis, 2007
Handbook of Optical Materials, Marvin J. Weber, 2003
Handbook of Optical Constants of Solids, Edward D. Palik (editor), 1998
IEC 60672-3: Ceramic and glass-insulating materials - Part 3: Specifications for individual materials