Why choose Sapphire?
One of the hardest materials available
Superior IR & UV transmission compared to other optical materials
Highly scratch & abradant resistant
Highly chemical resistant
Maximum temperature rating of almost 2000℃
Excellent dielectric & loss tangent performance
Properties of Single Crystal Sapphire
Chemical formula | Al₂O₃ |
Purity | 99.999% |
Crystal structure | Hexagonal |
Density | 3.98g/cm |
Hardness Mohs | 9 |
Fusion point | 2045℃ |
Boiling point | 3000℃ |
Coefficient of Thermal Expansion | 5.8×10 -6 /K |
Specific heat | 0.418W.s/g/k |
Thermal conduction | 25.12W/m/k(@100°C) |
Refractive index | no=1.768 ne=1.760 |
dn/dt | 13×10-6/K(@633nm) |
Transmission | T≈80%(0.3-5μm) |