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Sapphire
Sapphire hase a combination of optical and physical properties. Sapphire maintains its strength even at high temperatures.It has good thermal properties, excellent electrical and dielectric properties and is resistant to chemical attack. These properties encourage the use of sapphire in aggressive environments where reliability , optical transmission and strength are required.
Main include: UV and IR Optics; Windows for High Temperature and Pressure, Corrosion Resistance, Abrasion Resistance; Heat Sinders and Thermocouplers; Semiconductor Water Carriers; Electrical Insulators; Thin Film Deposition; Transparent Electronic Substrate; Silicon on Sapphire Wafers; Superconductor Substrate.
Other high-precision Sapphire windows,AR- and HR-coatings are available upon request. Sapphire boule grown by CZ method and a-cut Sapphire blocks are also available.
Basic Properties :
| Crystal structure | Hexagonal System |
| Lattice | a=4.785Å, C=12.991Å |
| Density | 3.98g/cm 3 |
| Transmission Range | 150-5500nm |
| Melting Point | 2040°C |
| Specific Heat | 0.418 W.s/g/K |
| Thermal Conductivity | 25.12 W/m/K |
| Thermal Shock Resistance | 790 W/m |
| Thermal Expansion Coefficient | 5.8x10 -6 /K |
| dn/dt, @633nm | 13x10 -6 /K |
| Mohs Hardness | 9 |
| Refractive Index | 1.83 @0.26 m m, 1.76 @0.63 m m, 1.58 @5.57 m m |
Standard Specifications of Sapphire Windows and Mirrors:
| Diameter | +/-0.0, -0.1mm |
| Thickness | +/-0.2mm |
| Flatness | better than l per 25 @633nm |
| Parallelism | better than 3 |
| Perpendicularity | better than 5 |
| Scratch-Dig | 80-50 per MIL-O-13830A |
| Wavefront Distortion | less than l /2 per inch( l @1064nm) |
Ante Laser Technology Co.,Ltd
Add：Floor 2,Building F, Guangdong Soft-park #7 Caipin Rd, Science Town, Guangzhou 510635, PR China
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Tel：020-2839 5163 Fax：020-28395073
e-mail：sales@anteLaser.cn