Large-Diameter Sapphire Growth Process And Properties

Sapphire(α-Al₂O₃,referred to as corundum) is to contain a small amount of Fe²⁺ and Ti⁴⁺ crystal.The crystal contains trace impurities corundum,which has an excellent optical, electrical and mechanical property,its hardness only to diamond.The crystal has a high-temperature chemical stability,good thermal conductivity and so on.Widely used in semiconductor devices,optoelectronic devices,lasers and so on.Especially with Ti³⁺ Sapphire is the best in the solid broadband tunable laser materials,the production of the super-middleweight femtosecond tunable lasers.As a result,high-quality large-diameter sapphire crystal synthesis is an important issue.In this paper,adopt flame fusion grown technology,useγ-Al₂O₃ powder as raw materials,design and reasonable process parameters,and grow a better quality of the opticalα- Al₂O₃ laser crystal.Analysis of crystal growth process of the problems and take corresponding measures.Transformation in the furnace put proposals to lengthen the length of furnace,so that more suitable furnace sintering gemstones.Research on the causes of crystal defects,design and reasonable process parameters,and improve the conditions of temperature field,reducing the vertical and horizontal temperature gradient,reducing cracks gemstones.Slip on the stones,bubble and crack and other issues to do an in-depth study and submit a solution.To improve the annealing process,research gem annealing stage holding time on the quality of crystal and precious stones annealing temperature to determine the views put forward a key reference for the relevant experiments.