Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Nadezhda A. Zhuk"'
Autor:
Nadezhda A. Zhuk, Boris A. Makeev, Aleksandra V. Koroleva, Sergey V. Nekipelov, Olga V. Petrova
Publikováno v:
Chemistry, Vol 6, Iss 2, Pp 323-332 (2024)
Co doped bismuth magnesium tantalate with a pyrochlore structure (sp. gr. Fd-3m) was synthesized for the first time using the standard ceramic method. Single phase Bi2Mg1−xCoxTa2O9 samples were found to be formed when x < 0.7 in the X-ray phase ana
Externí odkaz:
https://doaj.org/article/74ac746bdca8456a9ffd4cb6f3278d9f
Autor:
Nadezhda A. Zhuk, Boris A. Makeev, Aleksandra V. Koroleva, Aleksey M. Lebedev, Olga V. Petrova, Sergey V. Nekipelov, Viktor N. Sivkov
Publikováno v:
Inorganics, Vol 12, Iss 3, p 74 (2024)
Two series of the bismuth tantalate pyrochlore samples, codoped with Mg,Mn and Zn,Mn, were synthesized via solid-phase reaction. It was established that the Bi2Mg(Zn)xMn1−xTa2O9.5−Δ (x = 0.3; 0.5; 0.7) samples contain the main phase of cubic pyr
Externí odkaz:
https://doaj.org/article/77c3473042514b0eb370d3ba91eaff82
Autor:
Nadezhda A. Zhuk, Boris A. Makeev, Maria G. Krzhizhanovskaya, Sergey V. Nekipelov, Danil V. Sivkov, Ksenia A. Badanina
Publikováno v:
Crystals, Vol 13, Iss 8, p 1202 (2023)
The phase formation process of Bi2Cr1/6Mn1/6Fe1/6Co1/6Ni1/6Cu1/6Nb2O9+Δ containing 3d-ions of transition elements in equimolar quantities was studied in a wide temperature range (400–1050 °C). The complex oxide crystallizes in the structural type
Externí odkaz:
https://doaj.org/article/a79265fadbff45b188aeda7417db3227
Autor:
Sergey V. Nekipelov, Victor N. Sivkov, Danil V. Sivkov, Alexey M. Lebedev, Ratibor G. Chumakov, Aleksandra V. Koroleva, Boris A. Makeev, Nadezhda A. Zhuk
Publikováno v:
Inorganics, Vol 11, Iss 7, p 285 (2023)
The effect of Zn-doping on the phase composition and optical properties of the Bi2ZnxFe1-xTa2O9.5-Δ (x = 0.3, 0.5, 0.7) was studied. XRD data showed that the samples crystallize in the structural type of pyrochlore (sp. gr.Fd-3m). For all the sample
Externí odkaz:
https://doaj.org/article/9833b3e70d4c43f09bef474331c7c295
Autor:
Nadezhda A. Zhuk, Ksenia A. Badanina, Roman I. Korolev, Boris A. Makeev, Maria G. Krzhizhanovskaya, Vladislav V. Kharton
Publikováno v:
Inorganics, Vol 11, Iss 7, p 288 (2023)
The formation mechanisms of pyrochlore-type Bi2Co1/2Cr1/2Nb2O9+Δ (space group Fd-3m, a = 10.4838(8) Å), in the temperature range from 400 to 1050 °C were studied by employing X-ray diffraction, scanning electron microscopy and energy-dispersive sp
Externí odkaz:
https://doaj.org/article/7093ec8d7b23459c91ead1fba4aaa39c
Autor:
Nadezhda A. Zhuk, Maria G. Krzhizhanovskaya, Nikolay A. Sekushin, Vladislav V. Kharton, Alexandra V. Koroleva, Sergey V. Nekipelov, Danil V. Sivkov, Viktor N. Sivkov, Boris A. Makeev, Alexey M. Lebedev, Ratibor G. Chumakov, Sofia Yu. Kovalenko
Publikováno v:
ACS Omega, Vol 6, Iss 36, Pp 23262-23273 (2021)
Externí odkaz:
https://doaj.org/article/734e8585f94f48c3b30a33e5f47e7094
Autor:
Vitaliy A. Muravyov, Maria G. Krzhizhanovskaya, Boris A. Makeev, Andrey N. Nizovtsev, Sergey V. Nekipelov, Viktor N. Sivkov, Danil V. Sivkov, Nadezhda A. Zhuk
Publikováno v:
Crystals, Vol 13, Iss 3, p 474 (2023)
The possibility of high-temperature solid-phase synthesis of Ni-doped bismuth tantalate pyrochlore, not only from the oxide compounds BiTaO4 and NiO but also using nickel chloride NiCl2 as a precursor, was shown for the first time. The concentration
Externí odkaz:
https://doaj.org/article/518dcbcbc2f64424b445cd20f1718034
Autor:
Nadezhda A. Zhuk, Maria G. Krzhizhanovskaya, Sergey V. Nekipelov, Viktor N. Sivkov, Danil V. Sivkov
Publikováno v:
Materials, Vol 15, Iss 21, p 7668 (2022)
A continuous series of solid solutions (Bi1.5Mg0.75−xFexTa1.5O7±Δ (x = 0–0.75)) with the pyrochlore structure were synthesized with the solid-phase method. It was shown that iron, like magnesium, is concentrated in the structure in the octahedr
Externí odkaz:
https://doaj.org/article/1722606a0b864d32b5f101be4b8f05ee
Autor:
Nadezhda A. Zhuk, Sofia Yu. Kovalenko, Roman I. Korolev, Boris A. Makeev, Maria G. Krzhizhanovskaya, Danil V. Sivkov, Sergey V. Nekipelov, Viktor N. Sivkov, Maria V. Yermolina
Publikováno v:
ACS Omega. 8:11351-11363
Autor:
Kharton, Nadezhda A. Zhuk, Ksenia A. Badanina, Roman I. Korolev, Boris A. Makeev, Maria G. Krzhizhanovskaya, Vladislav V.
Publikováno v:
Inorganics; Volume 11; Issue 7; Pages: 288
The formation mechanisms of pyrochlore-type Bi2Co1/2Cr1/2Nb2O9+Δ (space group Fd-3m, a = 10.4838(8) Å), in the temperature range from 400 to 1050 °C were studied by employing X-ray diffraction, scanning electron microscopy and energy-dispersive sp