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Information × Registration Number 0201U001934, 0198U004254 , R & D reports Title Study of the mechanism of formation of foreign phase microparticles in sapphire crystals grown in protective media. Development of high efficiency method for growing optical crystals popup.stage_title Head Dan'ko O.Ya., Registration Date 26-02-2001 Organization Department of Optical and Constructional Crystals of STC <Institute for Single Crystals> popup.description2 The main mechanism of light scattering centers' formation in sapphire crystals during melt crystallization in the gas medium has been found. Determined have been "critical" concentrations of the main impurities (Ca, Mg, Ti, Fe, Na, C) which favour formation of foreign phase particles at melt crystallization in the gas medium. On the basis of these conclusions developed has been an improved method for the preparation of raw material of alumina. Product Description popup.authors popup.nrat_date 2020-04-02 Close