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Thermoanalytical characterization of vanadium-chromium oxide compounds prepared by 'soft chemistry' method

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Summary

Hydrated microcrystalline compound, V1-xCrxOy·nH2O, where x<0.063 and 4.4<n<8 and hydrated amorphous phases, CrVO4·H2O and Cr2V4O13·4H2O have been prepared using peroxo-polyacids of vanadium and chromium. The transformations of these hydrated phases upon heating were studied by TG-DTA and XRD techniques and led to three crystalline anhydrous compounds: (i) phase V1-xCrxOy, which is closely related to the orthorhombic V2O5, (ii) Cr2V4O13 and (iii) monoclinic CrVO4-M. The ranges of coexistence of phases in equilibrium were also determined.

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Authors and Affiliations

  1. Institute of Isotopes, Chemical Research Center of the Hungarian Academy of Sciences, P.O. Box 77, 1525 Budapest, Hungary

    O. Pozdnyakova

  2. Institute of Isotopes, Chemical Research Center of the Hungarian Academy of Sciences, P.O. Box 77, 1525 Budapest, Hungary

    J. Megyeri

  3. Department of Nuclear Chemistry, Research Group of Nuclear Methods in Structural Chemistry HAS, Eötvös Lorand University, P.O. Box 32, 1518 Budapest, Hungary

    E. Kuzmann

  4. Institute of Isotopes, Chemical Research Center of the Hungarian Academy of Sciences, P.O. Box 77, 1525 Budapest, Hungary

    L. Szirtes

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  1. O. Pozdnyakova
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  2. J. Megyeri
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  3. E. Kuzmann
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  4. L. Szirtes
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Pozdnyakova, O., Megyeri, J., Kuzmann, E. et al. Thermoanalytical characterization of vanadium-chromium oxide compounds prepared by 'soft chemistry' method. J Therm Anal Calorim 82, 409–415 (2005). https://doi.org/10.1007/s10973-005-0910-4

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  • DOI: https://doi.org/10.1007/s10973-005-0910-4

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