Large size Sapphire crystals up to 4'' boule are available from Dayoptics, As the hardest of oxide crystals, sapphire has a combination of optical and physical properties that make it the best choice for a variety of demanding applications. 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 requied.
Main applications Include: UV and IR Optics; Windows for High Temperature and Pressure, Corrosion Resistance, Abrasion Resistance; Heat Sinders and Thermocouplers; Semiconductor Wafer Carriers; Electrical Insulators; Thin Film Deposition; Transparent Electronic Substrate; Silicon on Sapphire Wafers; Superconductor Substrate.
||Hexagonal System |
||a=4.785, C=12.991 |
||0.418 W.s/g/K |
||25.12 W/m/K |
|Thermal Shock Resistance
||790 W/m |
|Thermal Expansion Coefficient
||5.8x10 -6 /K |
||13x10 -6 /K |
||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: |
||+/-0.0, -0.1mm |
||better than l per 25 @633nm |
||better than 3' |
||better than 5' |
||80-50 per MIL-O-13830A |
||less than l /2 per inch( l @1064nm) |
Ohter high-precision Sapphire windows, AR- and HR-coatings are available upon request. Sapphire boule grown by CZ method and as-cut Sapphire blocks are also available.