What is sapre?Sapre, the single crystal form of alumina (Al2O3), synthetic sapre is often the material of choice for design engineers dealing with extreme conditions of high temperature, high pressure and harsh chemical environments.Now synthetic sapre products are widely used in mobile devices windows, LED substrates, watch lenses, customized sapre 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 sapre related products including sapre crystal ingots, 2-8 inches sapre rods, wafers and customized sapre products.
Signup today to claim your Discount. Get Started before it's too late!
