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Formation of Perovskite and Pyrochlore Phases during Mechanochemical Synthesis of Lead Ferroniobate

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Abstract

We have studied the effect of mechanical activation in lead ferroniobate synthesis on the formation of perovskite and pyrochlore phases during both mechanochemical synthesis and subsequent firing. It has been shown that, during mechanical activation, the first to form is the perovskite structure. During subsequent sintering of the material, the pyrochlore structure begins to form as well. As the firing temperature is raised to 650–750°C, the perovskite structure is again formed. We provide explanation for this process.

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Funding

This work was supported by the Russian Foundation for Basic Research (project no. 17-03-01293_a) and the Russian Federation Ministry of Science and Higher Education (state research targets for Southern Federal University, 2020, and for the Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences; project no. 0301-2016-0015).

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Correspondence to A. A. Gusev.

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Translated by O. Tsarev

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Gusev, A.A., Raevski, I.P. & Isupov, V.P. Formation of Perovskite and Pyrochlore Phases during Mechanochemical Synthesis of Lead Ferroniobate. Inorg Mater 56, 968–974 (2020). https://doi.org/10.1134/S0020168520090083

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