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Borosilicate Glass
Material Properties
Compressive (Crushing) Strength: 2000 MPa (290 x 103 psi)
Density: 2.15 to 2.25 g/cm3 (134 to 140 lb/ft3)
Dielectric Constant (Relative Permittivity): 4.0 to 6
Dielectric Strength (Breakdown Potential): 5.0 to 30 kV/mm (0.2 to 1.2 V/mil)
Elastic (Young's, Tensile) Modulus: 60 to 70 GPa (8.7 to 10 x 106 psi)
Electrical Resistivity Order of Magnitude: 9 to 12 10x Ω-m
Flexural Strength: 30 to 69 MPa (4.4 to 10 x 103 psi)
Fracture Toughness: 0.8 MPa-m1/2
Light Transmission Range: 0.3 to 2.5 µm
Melting Onset (Solidus): 560 °C (1040 °F)
Poisson's Ratio: 0.21
Refractive Index: 1.474 to 1.523
Specific Heat Capacity: 750 to 820 J/kg-K
Tensile Strength: Ultimate (UTS): 280 MPa (41 x 103 psi)
Thermal Conductivity: 1.2 W/m-K
Thermal Expansion: 3 to 5.5 µm/m-K
See Also
Dictionary of Glass: Materials and Techniques, Charles Bray, 2002
Glass: Mechanics and Technology, Eric Le Bourhis, 2007
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