Al2O3 shaped crystals grown under stationary stable state and optical characterizations

Abstract Sapphire rod shaped single crystals were grown from the melt under stationary stable state using pulling down technique. The utilisations of sapphire crystals for optical applications require high quality, especially chemical homogeneity and defects minimisation. We will present the growth conditions and crystals quality of sapphire rods grown by pulling down technology using Al 2 O 3 spherical powder.