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Information × Registration Number 0303U001474, 0101U003493 , R & D reports Title Investigation of a complex effect of anionic vacancies and foreign phase impurities on optical characteristics of crystals grown in gas medium; development of scientific foundations for the preparation of large optical elements of sapphire for operation under the extreme conditions. popup.stage_title Визначення оптимального домішкового складу сировини для високої прозорості в УФ-області спектру. Head Dan'ko Aleksandr Yakovlevich, Registration Date 20-03-2003 Organization Department of Optical and Constructional Crystals of STC <Institute for Single Crystals> popup.description2 It has been found that growth conditions have influence on optical characteristics of crystals. Irrespective of the impurity composition of raw powder (from ~ 10 to ~ 100 ppm) and conditions of its preparation (redusing or netural) increase of pressure of the reducing atmosphere leads to the rise of intensity of the absorption bands in the region of F-centers and lowering of absorption of (=230 nm (bands Ті4+).5635 Product Description popup.authors popup.nrat_date 2020-04-02 Close