Abstract
The thermodynamic characteristics of bismuth niobate doped with erbium Bi3Nb0.2Er0.8O6.2 have been determined. This compound is a representative of a promising class of ionic conductors. The solution enthalpies of bismuth oxide, erbium oxide, niobium chloride, and Bi3Nb0.2Er0.8O6.2 have been measured in 4 M HCl using solution calorimetry. Based on the experimental and reported data, we have calculated the standard formation enthalpy ΔfH°(Bi3Nb0.2Er0.8O6.2, 298.15 K) = −1787.5 ± 8.9 kJ/mol and the lattice enthalpy ΔlatH°(Bi3Nb0.2Er0.8O6.2, 298.15 K) = −28 540 kJ/mol. The obtained thermodynamic characteristics can be used to develop recommendations for optimizing the synthesis of materials based on bismuth oxides.
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This work was supported by the Russian Science Foundation (project no. 19-19-00095).
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Matskevich, N.I., Semerikova, A.N., Gelfond, N.V. et al. Enthalpy of Formation of Erbium-Doped Bismuth Niobate. Russ. J. Inorg. Chem. 65, 743–746 (2020). https://doi.org/10.1134/S0036023620050162
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DOI: https://doi.org/10.1134/S0036023620050162