![]() | Product SpecificationsSapphire | |
Mechanical Properties | ||
Density | 3.97g/cm3 | |
Vickers Hardness ∥ to c-axis | 1940 | |
Vickers Hardness ⊥ to c-axis | 2200 | |
Tensile Strength | 60,000 psi | |
Compressive Strength | 300,000 psi | |
Young’s Modulus | 74 x 106 psi | |
Poisson Ratio | 0.28 | |
Thermal Properties | ||
Melting Point | 2050°C | |
Thermal Conductivity | 32W/Mk (@258°C) | |
Specific Heat | 1.99 J/cm3°C) | |
Electrical Properties | ||
Resistivity | @25°C > 1018 ohm cm @500°C > 1012 ohm cm | |
Dielectric Constant | Perpendicular to C axis 9.3 (KHz-I GHz, 25°) Parallel to C axis 11.5 (KHz-I GHz, 25°) | |
Dielectric Strength | 480,000 v/cm | |
Optical Properties | ||
Near and Mid-wave IR transmission | >86% | |
UV transmission | >70% | |
Refractive Index | 1.83 @ 0.26 μm 1.76 @ 0.63 μm 1.58 @ 05.57 μm | |
Birefringence | 0.0087 @ 0.55 μm |