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Conductivity of the nanostructured ceramic material Zr0.88Sc0.1Ce0.01Y0.01O1.955 prepared from mechanically activated powders

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Abstract

The structure of the Zr0.88 Sc0.1Ce0.01Y0.01O1.955 solid solution, a candidate for the use as a solid electrolyte in fuel cells with a low temperature, has been investigated using x-ray powder diffraction and Raman spectroscopy. Single-phase ceramic materials have been produced from powders prepared by the mechanochemical synthesis from ZrO2 nanoprecursors purified of the impurities introduced during grinding of commercial zirconia. The solid solution has a rhombohedral structure at room temperature owing to the partial ordering of oxygen vacancies. The electrical conductivity of the ceramic materials sintered at temperatures below 1570 K exhibits a hysteresis due to the delay of the martensitic transition from the cubic phase to the rhombohedral phase upon cooling of the sample. The nanostructured ceramic materials are characterized by a high mechanical strength and unusually close values of the activation energies for bulk and grain-boundary electrical conduction.

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Authors and Affiliations

  1. Institute of Solid-State Chemistry and Mechanochemistry, Siberian Branch, Russian Academy of Sciences, ul. Kutateladze 18, Novosibirsk, 630128, Russia

    V. V. Zyryanov, N. F. Uvarov, A. S. Ulikhin, V. G. Kostrovskii, B. B. Bokhonov & K. S. Paichadze

  2. Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent’eva 5, Novosibirsk, 630090, Russia

    V. P. Ivanov & V. A. Sadykov

  3. Trofimuk United Institute of Geology, Geophysics, and Mineralogy, Siberian Branch, Russian Academy of Sciences, pr. Koptyuga 3, Novosibirsk, 630090, Russia

    A. T. Titov

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  1. V. V. Zyryanov
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  2. N. F. Uvarov
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  3. A. S. Ulikhin
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  4. V. G. Kostrovskii
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  5. B. B. Bokhonov
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  6. V. P. Ivanov
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  7. V. A. Sadykov
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  8. A. T. Titov
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  9. K. S. Paichadze
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Additional information

Original Russian Text © V.V. Zyryanov, N.F. Uvarov, A.S. Ulikhin, V.G. Kostrovskii, B.B. Bokhonov, V.P. Ivanov, V.A. Sadykov, A.T. Titov, K.S. Paichadze, 2009, published in Neorganicheskie Materialy, 2008, Vol. 45, No. 1, pp. 94–101.

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Zyryanov, V.V., Uvarov, N.F., Ulikhin, A.S. et al. Conductivity of the nanostructured ceramic material Zr0.88Sc0.1Ce0.01Y0.01O1.955 prepared from mechanically activated powders. Inorg Mater 45, 90–98 (2009). https://doi.org/10.1134/S0020168509010142

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  • DOI: https://doi.org/10.1134/S0020168509010142

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