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High-Temperature Heat Capacity of Y0.65Pr0.35BiGeO5 and Y0.65Nd0.35BiGeO5 in the Range 350–1000 K

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Abstract

Oxides Y0.65Pr0.35BiGeO5 and Y0.65Nd0.35BiGeO5 have been synthesized by a ceramic method. The heat capacity of fine crystalline samples has been studied in the range 350–1000 K by differential scanning calorimetry. The Cp = f(T) dependences can be described by the Maier–Kelley equation. The thermodynamic functions of these oxides—changes in enthalpy, entropy, and reduced Gibbs energy—have been calculated from the experimental data on high-temperature heat capacity.

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ACKNOWLEDGMENTS

This work was performed in the framework of State assignment of the Ministry of Education and Science of the Russian Federation for Siberian Federal University for 2017–2019 (project no. 4.8083.2017/8.9 “Formation of the database of thermodynamic characteristics of complex oxide polyfunctional materials containing rare and scattered elements”).

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Authors and Affiliations

  1. Siberian Federal University, 660041, Krasnoyarsk, Russia

    L. T. Denisova, N. V. Belousova, N. A. Galiakhmetova, E. O. Golubeva & V. M. Denisov

  2. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia

    A. D. Izotov

  3. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, 119991, Moscow, Russia

    Yu. F. Kargin

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  1. L. T. Denisova
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  2. A. D. Izotov
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  3. Yu. F. Kargin
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  4. N. V. Belousova
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  5. N. A. Galiakhmetova
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  6. E. O. Golubeva
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  7. V. M. Denisov
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Correspondence to L. T. Denisova.

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Translated by G. Kirakosyan

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Denisova, L.T., Izotov, A.D., Kargin, Y.F. et al. High-Temperature Heat Capacity of Y0.65Pr0.35BiGeO5 and Y0.65Nd0.35BiGeO5 in the Range 350–1000 K. Dokl Phys Chem 483, 151–154 (2018). https://doi.org/10.1134/S0012501618120011

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  • DOI: https://doi.org/10.1134/S0012501618120011

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