High-temperature heat capacity of the oxide compounds in the Bi 2 O 3 –V 2 O 5  system

L. T. Denisova; L. A. Irtyugo; Yu. F. Kargin; L. G. Chumilina; N. V. Belousova; V. M. Denisov; N. A. Galiakhmetova

doi:10.1134/S0020168517030037

High-temperature heat capacity of the oxide compounds in the Bi₂O₃–V₂O₅ system

Autores: Denisova L.T.¹, Irtyugo L.A.¹, Kargin Y.F.², Chumilina L.G.¹, Belousova N.V.¹, Denisov V.M.¹, Galiakhmetova N.A.¹
Afiliações:
1. Institute of Nonferrous Metals and Materials Science
2. Baikov Institute of Metallurgy and Materials Science
Edição: Volume 53, Nº 3 (2017)
Páginas: 300-306
Seção: Article
URL: https://journals.rcsi.science/0020-1685/article/view/158188
DOI: https://doi.org/10.1134/S0020168517030037
ID: 158188

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The compounds BiVO₄, Bi₄V₂O₁₁, and Bi₁₂V₂O₂₃ have been prepared by solid-state synthesis using stoichiometric mixtures of Bi₂O₃ and V₂O₅. The effect of temperature on the heat capacity of the synthesized bismuth vanadates has been studied by differential scanning calorimetry in the range 350–950 K. The C_p(T) curves have extrema at 531.7 K for BiVO₄ and at 725.2 and 852.8 K for Bi₄V₂O₁₁, which are due to polymorphic transformations of these compounds.