Sapphire main features and applications:
1. Wear-resistant, high hardness, corrosion resistance, small friction coefficient, is an ideal material for precision instrument mechanical bearings;
2. Abrasion resistance, high hardness, corrosion resistance, and excellent light transmission performance, so it is also the preferred cover material for advanced watches;
3. High strength, corrosion resistance, high thermal conductivity, high thermal conductivity, high light transmission characteristics and wide light transmission band (from near ultraviolet to 7um mid-infrared band), is an ideal window material and optical component material;
4. Excellent electrical insulation performance, hexagonal symmetrical structure, stable chemical performance, excellent semiconductor and superconducting substrate materials (small leakage capacitance and parasitic capacitance);
5. The lattice constant mismatch rate between the sapphire C-plane and the III-Ⅴ and II-Ⅵ group deposited films is small (the mismatch rate with GaN is less than 4%), so it is currently the most important GaN blue LED and LD Epitaxial substrate material.

Highly recommended Sapphire Items from Yutai Optics:
Sapphire windows,
Sapphire Step Glass,  
Sapphire Windows with Holes,
Sapphire Windows with Groove,
2/4/6/8" Sapphire Wafers.

Transmittance of Sapphire:


Specifications: 
Material:Sapphire
Diameter Tolerance :+/-0.15 mm
Thickness Tolerance :+/-0.1mm 
Parallelism <3 arc minutes
Surface Quality :60-40
Surface Figure:λ/10@633nm 
Bevel:0.25mm×45 ° 
Clear Aperture:90% 
Coating:Specified by customers