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Information × Registration Number 0217U000829, 0114U005011 , R & D reports Title Oxygen vacancies engineering and related physical properties of perovskites popup.stage_title Head Bykov Igor Pavlovich, Registration Date 10-03-2017 Organization Frantzevich Insitute for Materials Science Problems of the Ukranian National Academy of Sciences popup.description2 EPR, NMR spectra were studied in SrTiO3:Cr crystalline nanopowders, Pb(Zr1-xTix)O3 ceramics and solid solutions on its base. It was found that paramagnetic Cr3+, Cr5+, Cr3+surf, O-, O2- ions are present in STO:Сr nanopowders. A correlation between O- and O2- content, synthesis conditions and particles size was found. Several impurity sites have been identified in the materials on PZT base, including Fe3+-oxygen vacancy complex and Pb ions. It is showen that increasing of the iron concentration leads to a distortion of the crystal structure and to improvement of the electrophysical parameters of the piezoceramics, stoping at concentrations of iron more than 0.4 mol.%). Ni3+ EPR signal was obtained for the first time. EPR spectra indicated the formation of phases of nickel and iron magnetoplumbite in some solid solutions. Product Description popup.authors Васильєв Олександр Дмитрович Юрченко Леся Петрівна popup.nrat_date 2020-04-02 Close