Glass-Bonded Mica
Glass-bonded mica is a glass-type material. It has the lowest tensile strength and the highest thermal conductivity among glass and glass-ceramics. The graph bars on the material properties cards below compare glass-bonded mica 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.
Mechanical Properties
Compressive (Crushing) Strength
270 MPa 39 x 103 psi
Elastic (Young's, Tensile) Modulus
71 GPa 10 x 106 psi
Flexural Strength
79 MPa 12 x 103 psi
Impact Strength: Notched Izod
85 J/m 1.6 ft-lb/in
Tensile Strength: Ultimate (UTS)
39 MPa 5.7 x 103 psi
Thermal Properties
Maximum Temperature: Mechanical
450 °C 840 °F
Maximum Thermal Shock
110 °C 240 °F
Specific Heat Capacity
500 J/kg-K 0.12 BTU/lb-°F
Thermal Conductivity
23 W/m-K 13 BTU/h-ft-°F
Thermal Expansion
6.7 µm/m-K
Other Material Properties
Density
2.6 g/cm3 160 lb/ft3
Dielectric Constant (Relative Permittivity) At 1 MHz
6.8
Dielectric Strength (Breakdown Potential)
20 kV/mm 0.78 V/mil
Electrical Dissipation At 1 MHz
0.0016
Electrical Resistivity Order of Magnitude
10 10x Ω-m
Common Calculations
Stiffness to Weight: Axial
15 points
Stiffness to Weight: Bending
52 points
Strength to Weight: Axial
4.1 points
Strength to Weight: Bending
9.7 points
Thermal Diffusivity
18 mm2/s
Thermal Shock Resistance
5.9 points
Followup Questions
Further Reading
Ceramic and Glass Materials: Structure, Properties and Processing, James F. Shackelford and Robert H. Doremus (editors), 2008
IEC 60672-3: Ceramic and glass-insulating materials - Part 3: Specifications for individual materials
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015