It has been shown that the modified sol-gel method (method Pechini) successfully synthesizes multielement oxides based on bismuth niobate, crystallizing in the pyrochlore structure type (space group Fd-3m). The synthesis temperature of a single-phase sample is 950 ?С, which is one hundred degrees lower than the calcination temperature in the traditional ceramic synthesis method. The average crystallite size, determined by X-ray diffraction, varies from 39 (850 ?С) to 48 nm (1050 ?С) depending on the sintering temperature. According to X-ray phase analysis, the unit cell parameter is 10.4872(6) ?. The results of elemental mapping indicate a uniform distribution of metal atoms on the surface of the sample, and X-ray energy dispersive analysis showed that the chemical composition of the synthesized sample corresponded to the specified theoretical composition.
Ksenia A. Badanina – master, Chemistry Department, Syktyvkar State University, Syktyvkar, Russia
Roman I. Korolev – senior lecturer, Department of Radiophysics and Electronics, Syktyvkar State University, Syktyvkar, Russia
Boris A. Makeev – Candidate of Geological-Mineralogical Sciences, researcher at the Laboratory of Mineralogy, Institute of Geology FRC Komi SC UB RAS, Syktyvkar, Russia
Nadezhda A. Zhuk – Candidate of Chemical Sciences, Associate Professor, senior researcher of Laboratory of Ceramic Materials Science, Syktyvkar State University, Syktyvkar, Russia
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