Watch glass round Sapphire windows 40mmx3mm
Basic Info
Model No.: SPL
Product Description
Watch glass Sapphire Windows
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) |
Sapphire windows
1.Material:sapphire
2.Dia.:40mm
3.Thickness:3mm
4.Surface quality:40/20
5.Transmission>85% at633nm
6.Chamfer:0.2mmx45 degree
7.Orientation:C A R free
8.Tol:+0.00/-0.05mm
Competitive Advantages
Well and High Quality Control ,
New Product ,
Customer's Design and Logo are Welcome ,
Competitive Prices ,
In a Variety of Design ,
Small Order Acceptable
Don't hesitate to send your inquiry! you will be replied immediately!
Product Categories : Sapphire Products > Sapphire Window
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