Nickel pyrochlore of the composition Bi2NiTa2O9 was synthesized by the solid-phase reaction method (sp. gr. Fd-3m, a = 10.5238 ?). The process of phase formation of nickel-containing bismuth tantalate Bi2NiTa2O9 with a pyrochlore structure is investigated. The pyrochlore phase synthesis reaction is described by the interaction of orthorhombic bismuth orthotantalate and nickel oxide. Synthesis proceeds mainly at temperatures above 900 °С. The duration of calcination of the preparations leads to the coalescence of grains with the formation of larger particles.
The calcination temperature did not significantly affect the microstructure of the samples. The samples are characterized by a porous dendritic microstructure with a grain size of 0.5 – 1.0 µm. The optimal conditions for obtaining pure pyrochlore can be considered a temperature of 1050 °С and calcination time of 15 hours.
Muraviev V. A. – Bachelor of Chemistry Department, Syktyvkar State University, Syktyvkar, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Makeev B. A. – Candidate of Geological-Mineralogical Sciences, Researcher at the Laboratory of Mineralogy of the Institute of geology FRC Komi SC UB RAS, Syktyvkar, Russia.E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Krzhizhanovskaya M. G. – Candidate of Geological and Mineralogical Sciences, Associate Professor, Department of Crystallography, Institute of Earth Sciences, St. Petersburg State University, St. Petersburg, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Korolev R. I. – Senior Lecturer, Department of Radiophysics and Electronics, Syktyvkar State University, Syktyvkar, Russia E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Zhuk N. A. – Candidate of Chemical Sciences, Associate Professor, Senior Researcher of Laboratory of Ceramic Materials Science, Syktyvkar State University, Syktyvkar, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
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