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Conductivity of Composites MeWO4–Al2O3 (Me = Ca, Sr)

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Abstract

Composites (1 – x)MeWO4–xАl2O3 (Me = Ca, Sr) are synthesized by the solid-phase method. Their phase composition and thermodynamic stability are confirmed by the XRD and TG-DSC data, respectively. Their morphology is studied by the SEM-EDA method. The conductivity of composites is studied by the method of electrochemical impedance spectroscopy as a function of the temperature, the gas-phase oxygen pressure, and the content of added disperse Аl2O3. It is shown that composites (1 – x)MeWO4–xАl2O3 (Me = Ca, Sr) are ionic conductors and their conductivity is 4–12 times higher as compared with the corresponding tungstates.

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Funding

The results of studies were obtained as a result of work on the State Assignment of the Ministry of Science and Higher Education of the Russian Federation, project no. FEUZ-2023-0016. The equipment of the Ural Center for Shared Use “Modern nanotechnology” UrFU (reg. no. 2968), supported by the Ministry of Science and Higher Education of the Russian Federation (project no. 075-15-2021-677) was used.

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Authors and Affiliations

  1. Ural Federal University named after the First President of Russia B.N. Yeltsin, 620002, Yekaterinburg, Russia

    A. F. Guseva, N. N. Pestereva, D. K. Kuznetsov, A. A. Boyarshinova & V. A. Gardt

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  1. A. F. Guseva
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  2. N. N. Pestereva
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  3. D. K. Kuznetsov
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  4. A. A. Boyarshinova
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  5. V. A. Gardt
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Correspondence to N. N. Pestereva.

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The authors declare that they have no conflict of interest.

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Translated by T. Safonova

Based on the materials of the 16th International Meeting “Fundamental Problems of Solid State Ionics,” Chernogolovka, June 27–July 3, 2022.

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Guseva, A.F., Pestereva, N.N., Kuznetsov, D.K. et al. Conductivity of Composites MeWO4–Al2O3 (Me = Ca, Sr). Russ J Electrochem 59, 284–290 (2023). https://doi.org/10.1134/S1023193523040079

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  • DOI: https://doi.org/10.1134/S1023193523040079

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