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Information × Registration Number 0215U002369, 0111U008995 , R & D reports Title Research and development processes of ceramic and glass ceramic materials for immobilization of radioactive waste by methods of powder metallurgy popup.stage_title Head Sayenko Sergey Yuriyovych, Registration Date 07-08-2015 Organization National Science Center "Kharkiv Institute of Physics and Technology popup.description2 With the aim of the actinide, REE (rare earth elements)-actinide and REE-Zr-actinide fractions immobilization of high-level waste in the pyrochlore phase matrix, the composition, density, mechanical and corrosion properties of pyrochlore Gd2Zr2O7 ceramic samples were investigated. Monophase pyrochlore Gd2Zr2O7 was synthesized by solid-phase reactions at 1450 °C and exposure time under pressure conditions for 2 hours, and also, by co-precipitation at 1150 °C and exposure time of 1 hour. Pyrochlore ceramic samples obtained by hot pressing in a vacuum at 1450 ° C and pressure 50 MPa during exposure time for 1 hour, were characterized by homogeneous microstructure with a grain size of 1.0-1.5 microns (in the case of solid phase synthesis) and ~ 1.0 micron (for co-precipitation components method). The maximum density of the sample materials obtained by the method of solid phase synthesis and co-precipitation of initial components was 95.27% and 99%, respectively. The resulting pyrochlore ceramics has high mechanical strength (bending strength ? > 300 MPa), high corrosion properties (leaching rate V = 5 ? 10-8 g / cm2 · per day) and can be proposed as the perspective matrix material for immobilization of the actinide fractions of high-level waste. Product Description popup.authors Абеленціа Валерій Іванович виненко Леонид Михайлович дейчук Марія Олексіївна едовська Людмила Миколаївна жажа Жанета Сергіївна Зикова Ганна Веніамінівна ибов Сергій Ідлліч илипенко Олександр Васильович иронова Алла Григорівна Мошта Сергій Вітальович обач Константин В'ячеславович овська Олена Геннадіївна оломєєв Геннадій Олександрович Світличний Євген Олександрович Сурков Олександр Євгенич Тарасов Ростіслав Васильович тепіна Вікторія Віленівна улаєва Ніна Іванівна Чаплигіна Вікторія Юрївна Шкуропатенко Володимир Антонович popup.nrat_date 2020-04-02 Close