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Research of the properties of a complex oxide Bi2Co1/3Cu1/3Ni1/3Nb2O9+Δ with a pyrochlore structure
https://doi.org/10.26896/1028-6861-2025-91-5-38-44
Abstract
Bismuth-containing monodoped pyrochlores have promising photocatalytic and dielectric properties. The paper presents the results of studying the properties of multielement pyrochlore containing transition 3d-elements in equivalent amounts. Mixed oxide pyrochlore of the composition Bi2Co1/3Cu1/3Ni1/3Nb2O9+Δ (sp. gr. Fd-3m, a = 10.5378 ± 6 Å) was synthesized by the solid-phase reaction method. The chemical state of transition element cations in the oxide pyrochlore was estimated by X-ray photoelectron spectroscopy (XPS). The parameters of the Bi5d, Nb3d, Co2p, Ni2p, Cu2p XPS spectra for the mixed pyrochlore were compared with the parameters of transition element oxides. The content of Cu (I, II) cations was determined based on the analysis of the relative intensity of peaks in the Cu2p spectrum. It has been established that for complex pyrochlore a characteristic shift of Bi4f- and Nb3d-spectra to the region of lower energies by 0.25 and 0.65 eV, respectively, is observed. The width of the forbidden band of pyrochlore for the direct allowed most intense electronic transition is 1.1 eV. The obtained results can be used to improve the technology of manufacturing multilayer ceramic capacitors and microwave dielectric materials.
About the Authors
A. P. Petrakov
Pitirim Sorokin Syktyvkar State University
Russian Federation
Russian Federation
Anatoly P. Petrakov
55, Oktyabrsky prosp., Syktyvkar, 167001
K. A. Badanina
Pitirim Sorokin Syktyvkar State University
Russian Federation
Russian Federation
Ksenia A. Badanina
55, Oktyabrsky prosp., Syktyvkar, 167001
A. A. Selyutin
St. Petersburg State University
Russian Federation
Russian Federation
Artyom A. Selyutin
26, Universitetsky prosp., St. Petersburg, 198504
A. V. Koroleva
St. Petersburg State University
Russian Federation
Russian Federation
Alexandra V. Koroleva
26, Universitetsky prosp., St. Petersburg, 198504
S. V. Nekipelov
Institute of Physics and Mathematics of the Komi Science Center UB RAS
Russian Federation
Russian Federation
Sergey V. Nekipelov
4, ul. Oplesnina, Syktyvkar, 167982
B. A. Makeev
N. P. Yushkin Institute of Geology of the Komi Science Center UB RAS
Russian Federation
Russian Federation
Boris A. Makeev
54, ul. Pervomaiskaya, Syktyvkar, 167000
N. A. Zhuk
Pitirim Sorokin Syktyvkar State University
Russian Federation
Russian Federation
Nadezhda A. Zhuk
55, Oktyabrsky prosp., Syktyvkar, 167001
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Review
For citations:
Petrakov A.P., Badanina K.A., Selyutin A.A., Koroleva A.V., Nekipelov S.V., Makeev B.A., Zhuk N.A. Research of the properties of a complex oxide Bi2Co1/3Cu1/3Ni1/3Nb2O9+Δ with a pyrochlore structure. Industrial laboratory. Diagnostics of materials. 2025;91(5):38-44. (In Russ.) https://doi.org/10.26896/1028-6861-2025-91-5-38-44
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