|Type:||Watches For Parts||Material:||Sapphire|
|Shape:||Custom Shape||Surface Treatment:||Polished|
|Service:||OEM ODM||Surface Quality:||80/50,60/40,40/20|
|Usage:||Sapphire Glass For Watch||Coating:||AR,AF-Coating|
sapphire glass watch face,
synthetic sapphire glass
AR / AF Coating Smart Watch Sapphire Crystal Ground And Beveled Edge Finish
|Edge Finish||Ground and beveled|
|Surface Quality||40-20 scratch-dig|
|Surface Flatness||λ/4 @ 633 nm|
|Parallelism||≤3 arc min (≤0.9 mrad)|
|Clear Aperture||>80% of central diameter|
|Hardness (Knoop)||1370 kg mm-2|
|Young's modulus||3.4 x 1011 N m-2|
|Thermal Limit||22 W m-1 K-1|
|Thermal expansion coefficient||8.4 x 10-6 K-1|
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Interferometer Transmissivity detector
Quadratic element Orientometer
About sapphire glass
SAPPHIRE CRYSTAL (sapphire glass) generally refers to synthetic sapphire, generally used in the manufacture of the watch glass.
It is resistant to wear with tungsten titanium alloys and high-tech ceramics. but sapphire materials can wear resistance and
withstand the strong impact, and some of the same or higher hardness of the material (e.g., millstone, sandpaper, nail, granite,
concrete wall, and floor, etc.) so sapphire glass are not likely to scratch the surface of these materials.