Sapphire Ingot

What is sapphire? Sapphire, the single crystal form of alumina (Al2O3), synthetic sapphire is often the material of choice for design engineers dealing with extreme conditions of high temperature, high pressure and harsh chemical environments.Now synthetic sapphire products are widely used in mobile devices windows, LED substrates, watch lenses, customized sapphire components and military applications. Specification: General Properties Chemical composition AL2O3 Crystal structure Hexagonal System Melting point 2045ºC Thermal Properties Coefficient of expansion  Parallel to C-axix:6.7×10-6  Perpendicular to C-axis:5.0×10-6 Specific heat 0.18Cal/gm°K(25ºC) Mechanical Properties Density 3.98-4.1g/cm3 Hardness Moh′s Hardness:9 (Hv)≥1700Kg/mm2 Elastic modulus 340-380Gpa Compressive strength 2.1Gpa Compressive strength 0.19Gpa Optical Properties Index of refraction Parallel optical axis C-axis:1.769 Vertical optical axis C-axis:1.76 Infrared transmittance In 633nm wavelength>85% Translucent band 0.3um-6um Electrical Properties Resistivity >1016Ω(25ºC) Permittivity 7.5-10 Electrical Properties Corrosion resistance Will not be Eroded by acids of alkalis at normal temperature,will be Eroded by HF in 300ºC Who we are and what we do? We,LBYCRYSTAL Optoelectronics Co.,Ltd was established in 2014, specializes in processing and distributing sapphire related products including sapphire crystal ingots, 2-8 inches sapphire rods, wafers and customized sapphire products.