Browsing by Author "Dejneka, A."

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    Defect structure of zirconium oxide nanosized powders with Y2O3, Sc2O3, Cr2O3 impurities
    (Видавництво Львівської політехніки, 2012) Yurchenko, L.; Bykov, I.; Vasylyev, A.; Vereshchak, V.; Suchaneck, G.; Jastrabik, L.; Dejneka, A.
    Formation mechanisms of paramagnetic centers originating from Zr3+ and Cr3+ ions as well as the influence of composition of nanoparticles on thermogeneration processes of these paramagnetic centers in ZrO2 structure were studied. A set of nanosized powders of zirconium oxide was investigated by electron paramagnetic resonance method: nominally pure ZrO2; ZrO2 with Y2O3 and Sc2O3; ZrO2 with Cr2O3; ZrO2 with Y2O3 and Cr2O3. It is observed that the influence of annealing on EPR lines of Zr3+ and Cr3+ions is different. Nuclear magnetic resonance data have shown that zirconium dioxide nanoparticles with Sc and Y impurities include two types of water molecules and two types of hydroxyl groups.