sapphire parts ,sapphire glass plate for bearing ,optical glass
lens
by sapphire ,0.1mm thickness sapphire wafer ,optical glass ingots
by sapphire ,sapphire optical rods,Sapphire small lens,sapphire bearing
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
