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 

1. - For LED substrate application
2. Sapphire wafer and substrate applications include:
3. - Microelectronic IC applications - SOS Silicon-on-Sapphire
4. - Growth of superconducting compounds / Gallium Nitride - Infrared detectors
5. - Hybrid microelectronics - Polishing carriers
6. Hostile environment
7. Optical transmission from ultraviolet to near infrared
8. High temperature
9. Radiation resistance

2. sapphire sample size:dia12x2.5mmt lapped/lapped

3. What shape and size canwe provide?