Synthetic Sapphire Glass

Glass Type: Sapphire


Synthetic Sapphire is an aluminum oxide material grown in a hexagonal crystalline form. It’s a very hard material with a high resistance to heat. Because of its crystalline structure, material characteristics can change depending upon the requested orientation. SGP can CNC mill, drill, cut, lap, and polish Sapphire in many sizes, shapes, and surface finishes.

Thermal PropertiesMechanical Properties
Thermal Coefficient of Expansion(0/300°C): 45-53 X 10 -7/°CDensity3.97 g/cm3
Annealing PointN/AKnoop Hardness1525-2000 Kg/mm2
Softening Point2040°C / 3700 °FYoung's Modulus50-55X106 psi / 345 GPa
Strain PointN/APoisson's Ratio.28-.33
Chemical PropertiesElectrical Properties
Hydrolytic ResistanceN/ADielectric ConstantAvg. 9.3-11.5
Acid ResistanceN/AResistivityN/A
Alkali ResistanceN/ADielectric Strength4.8X105 v/cm
Optical Properties
Refractive Index1.768