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Information × Registration Number 0207U000855, 0104U003300 , R & D reports Title Synthesis and investigation of the properties of alumo-aluminium spinel (Al Al2 O4) and development of suentific foundaticris for the growth of optical sapphire under atmospheric pressure of gas media (~800 torr) popup.stage_title Head Dan'ko Aleksandr Yakovlevich, Registration Date 13-02-2007 Organization Institute for Single Crystals Scientific and Technology Association "Institute for Single Crystals" National Academy of Sciences of Ukraine popup.description2 For the first time it is established that in the process of ?-Al2O3 reduction by gaseous reducing agents (CO, H2) corundum crystals are transformed into new phases in the system Al-O with a content of oxygen lower in comparison with Al2O3, in which Al is partially present in bivalent state. Synthesized is the compound Al3O4 which exists under normal conditions in condensed state at temperatures up to 1400 K. The crystal lattice parameters of the obtained phases are determined. Investigated are the physical and mechanical properties of Al2O3 in view of its possible use as a new functional material for optics and optoelectronics.5635 Product Description popup.authors popup.nrat_date 2020-04-02 Close