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Microstructure and microhardness of vanadium oxides in the range VO0.57-VO1.29

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Abstract

X-ray diffraction and optical microscopy data are presented which demonstrate that substoichiometric vanadium oxide (VO0.57-VO0.97) consists of a cubic phase with the B1 structure (sp. gr. Fm \( \bar 3 \) m) and an ordered monoclinic phase of composition V14O6 (sp. gr. C2/m). The content of the latter phase decreases with increasing oxygen content. The superstoichiometric vanadium oxide VO1.29 is shown to contain trace amounts of V52O64. Vickers microhardness data for nonstoichiometric vanadium oxides in the range VO0.57-VO1.29 show that, with increasing oxygen content, their H V has a tendency to decrease, from 18 to 12 GPa. Their microhardness is shown for the first time to have a maximum near the stoichiometric composition VO1.00.

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Authors and Affiliations

  1. Institute of Solid State Chemistry, Ural Division, Russian Academy of Sciences, Pervomaiskaya ul. 91c, Yekaterinburg, 620041, Russia

    A. A. Valeeva, D. A. Davydov, S. V. Rempel & A. A. Rempel

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  1. A. A. Valeeva
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  2. D. A. Davydov
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  3. S. V. Rempel
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  4. A. A. Rempel
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Correspondence to A. A. Valeeva.

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Original Russian Text © A. A. Valeeva, D. A. Davydov, S. V. Rempel, A. A. Rempel, 2009, published in Neorganicheskie Materialy, 2009, Vol. 45, No. 8, pp. 975–980.

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Valeeva, A.A., Davydov, D.A., Rempel, S.V. et al. Microstructure and microhardness of vanadium oxides in the range VO0.57-VO1.29 . Inorg Mater 45, 905–909 (2009). https://doi.org/10.1134/S0020168509080159

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  • DOI: https://doi.org/10.1134/S0020168509080159

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