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Information × Registration Number 0223U002191, 0120U100220 , R & D reports Title Phase equilibria in systems based on REE oxides and development of multifunctional ceramic materials based on them popup.stage_title Head Korniienko Oksana A., Кандидат хімічних наук Registration Date 12-02-2023 Organization Institute of Problems of Materials Science named after IM Frantsevich of the National Academy of Sciences of Ukraine popup.description2  The Ce(NO3)3·6H2O, oxides: La2O3, Dy2O3, Er2O3, Yb2O3 with a content of the main component of 99.99%, as well as LaCl3, La(NO3)3, La2(SO4)3, AgNO3. The purpose of the work is to study the phase equilibria and properties of solid solutions in systems based on cerium oxides and rare earth elements (REEs) for the development of the physicochemical basis for the creation of multifunctional ceramic materials and the synthesis of nanomaterials based on cerium oxide and rare earth elements. Phase equilibrium in 6 ternary CeO2–La2O3–Ln2O3 (Ln = Dy, Ho, Yb) and La2O3–Lu2O3–Ln2O3 (Ln = Ho, Er, Yb) systems were studied for the first time with the help of methods of physicochemical analysis (X-ray diffraction, petrography, scanning electron microscopy and LRSA) and phase equilibria in the limiting binary La2O3–Ln2O3 (Ln = Dy, Ho, Lu) and CeO2–Ln2O3 (Ln = Dy, Ho, Yb) systems. Isothermal sections of phase diagrams of ternary systems CeO2–La2O3–Ln2O3 (Ln = Dy, Ho, Yb) and La2O3–Lu2O3–Ln2O3 (Ln = Ho, Er, Yb) at 1100, 1250, 1500, 1600°С are constructed. The solid solutions based on various polymorphous forms of constituent phases and ordered phase with a structure of the perovskite-type of LaLnO3 were revealed in the systems. Solubility limits and parameters of elementary cells formed in phase systems are determined. The main regularities of the phase diagrams for the ternary and binary systems are shown. It has been established that obtaining nanomaterials based on lanthanum and cerium oxides without the addition of silver significantly reduces the number of HSV-1 progeny and significantly reduces its virulence, and is promising for use against viruses with supercapsids, such as the pandemic strain SARS-Cov-2 Product Description popup.authors Barshevska Hanna K Bataiev Mekola M Bataiev Yuriy M Bykov Oleksandr I Zabiayaka Katerina I Korniienko Oksana A. Lavrinenko Olena N Pavlenko Olena P Stesenko Volodymyr P Tulinova Alla S Chudinovych Olga V Yurchenko Yuriy V Yushkevych Serhii V popup.nrat_date 2023-02-12 Close