Product Details
Sapphire crystal is an excellent multifunctional material widely used in industry, national defense, and aerospace. It has high-temperature resistance up to 2000 ℃, good thermal conductivity, high hardness (Morse 9th) and good chemical stability. Usually, this material is used for high-temperature resistant infrared window, solid laser, precision wear-resisting bearings. It is also widely applied in crystal substrate, especially for blue, purple, white light-emitting diodes (LED) and blue light laser (LD). As the hardest material among all oxide crystals, Sapphire has a combination of good optical and physical properties, which even maintains at high temperature, making it the best choice for a variety of demanding applications.
Features
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Applications
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Chemical and Phisical Properties
Property | Value |
Chemical formula | Al2O3 |
Crystal structure | Hexagonal |
Density | 6.73g/cm3 |
Melting Point | 2040°C |
Refractive Index | n=1.84 @550 nm |
n=1.623 @500 nm | |
Transmission band (μm) | 0.15-6 |
Polish
Surface flatness | <λ/8@632nm |
Clear aperture | >90% |
Orentation tolerance | <0.5° |
Parallel | 10” |
Perpendicular | 5’ |
Surface quality | 10/5 (Scratch/Dig) |
Chamfer | <0.2×45° |
Wavefront distorsion | <λ/8@632 nm |