sapphire parts ,sapphire glass plate for bearing ,optical glass lens
by sapphire ,0.1mm thickness sapphire wafer ,optical glass ingots
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1. What's Sapphire? What advantage sapphire have?
Sapphire is a hard crystal,it widely been used for watch and mobilephone, Beauty equipment ,
lasers,LED, and so on.
Material Sapphire(Al2O3)
Density(20°C) Kg/m3 3.98×103
Crystal Structure
hexagonal Crystal lattice constant
a=4.785Å c=12.991 Å
Mohs hardness 9
Melting Point 2045°C
Boiling Point 3000°C
Coefficient of Thermal
Expansion α=5.8×10 -6 /K
Specific heat 0.418W.s/g/k
Thermal conduction 25.12W/m/k(@100°C)
Refractive Index (nd) no=1.768 ne=1.76 dn/dt
13×10-6/K(@633nm)
Tranmission T≈80%(0.3~5um)
Permittivity 11.5(//c), 9.3(⊥c)
Application
- - For LED substrate application
- Sapphire wafer and substrate applications include:
- - Microelectronic IC applications - SOS Silicon-on-Sapphire
- - Growth of superconducting compounds / Gallium Nitride - Infrared detectors
- - Hybrid microelectronics - Polishing carriers
- Hostile environment
- Optical transmission from ultraviolet to near infrared
- High temperature
- Radiation resistance
2. sapphire sample size:dia12x2.5mmt lapped/lapped
3. What shape and size canwe provide?
Specification for sapphire lens
| 1. | Material | Sapphire etc |
| 2. | Dimension | shape0.5-300mm x thickness 0.1~200mm |
| 3. | Dimension Tolerance | ±0.01~0.1mm |
| 4. | Angle Tolerance | 3'~5' |
| 5. | Surface Quality | 80/50,60/40,40/20,20/10, |
| 6. | Flatness | Lambda /4 to 2 Lambda |
| 7. | Bevel | 0.25 mm at 45 degrees |
| 8. | Coating | AR coating or custom |
Process of sapphire lens
sapphire crystal (KY)--> customized orientation rough block--> anneal 1600°-->wire saw cut-->
shape rough lapped-->chamfer---> (anneal ) ---> fine groud lapped--> polished -->check test
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0.1mm Thickness Sapphire Wafer Al2O3 Material For Small Optical Glass Lens Images
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