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Information × Registration Number 0206U004748, 0105U003753 , R & D reports Title Investigation of the influence of impurities present in the melt on the formation of another phase at annealing shaped sapphire in different media popup.stage_title Head Litvinov Leonid Arkadievich, Registration Date 16-03-2006 Organization Institute for Single Crystals Scientific and Technology Association "Institute for Single Crystals" National Academy of Sciences of Ukraine popup.description2 Developed is the earlier proposed method of concentration of gaseous impurities inside the crystal in the form of closed cavity which allows to calculate the concentration of gaseous impurities in the melt. Investigated are the causes of the formation of foreign phases and of surface destruction at annealing the crystals grown from raw material with different concentrations of uncontrolled impurities. The influence of crystallization rate and crystallographic growth direction on the optical crystal quality is studied. Established is the critical growth rate corresponding to the lowest content of crystal defects and its dependence on the crystallographicl growth direction.5635 Product Description popup.authors popup.nrat_date 2020-04-02 Close