86-769-88023127
4th Floor, Building A, No. 3, Road 1, Buxinji Industrial Zone, Guanjingtou, Fenggang Town, Dongguan, Guangdong, China (Mainland)
[Customized optical sapphire windows glass factory in Shenzhen ]
+ Sonicleaning,silk-screen printing and electroplating in cleanroon;
+ 100% QC inspection before packing;
+ Without defects on our products,high purity;
+ Vacuum packing;
+ All our products pass SGS,CE,Rohs;
+ With good leading time;
+ Germany technology,Chinese price;
+ can be customized as design size,shape,bevel chamfer,tolerance,artwork;
+ have normal size in stock;
+ Widely uesd for watch glass,optical window,lens,militry etc;
+ The material is synthetic sapphire(hardness 9H) or mineral glass+sapphire coating(hardness 8H);
+ Flatness: <20μm;
+ Surface quality:40/20;
| Sapphire chemical formula | AL2O3 |
| Crystal structure | Hexagonal |
| Hardness Mohs | 9H |
| Compressvise strength | Gpa 2.0 |
| Density(20℃) | 3.98g/cm |
| Fusion point | 2040℃ |
| Boiling point | 2980℃ |
| 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) |
| Optical transmission range | 0.17-5.5μm |
| Transmission(0.3~5um) | 85-88% |
| Refractive index | no=1.768nd |
| ne=1.76nd | |
| dn/dt | 13×10-6/K(@633nm) |
| Permittivity | 11.5(https://c), 9.3(⊥c) |
Please try to offer more details as belowing when you place an order:
Drawing/Tolerance/Material/Hardness/
Coating/Color/Semitransparent rate/use for what products.
