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Real structure and thermal properties of solid solutions of γ-GdxDy1−xS1.5−y

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Thermophysics and Aeromechanics Aims and scope

Abstract

The work is devoted to the study of temperature dependences of thermal conductivity (T = 300–770 K) of polycrystallic samples of solid solutions based on gadolinium and dysprosium sulfides of the compositions: γ-GdxDy1−xS1.49 (x = 0.1, 0.2, 0.3, 0.4). It has been found that the morphological features of samples, namely, the specific surface area of crystallites, which causes a change in the number of deformation centers, determines the value of the thermal conductivity of γ-GdxDy1−xS1.49 solid solutions. The presence of an abnormal decrease in thermal conductivity for the composition of x = 0.2 has been established. When the temperature increases to 770 K, this anomaly decreases slightly. The minimum value of the thermal conductivity coefficient of 0.68 ± 0.03 W/(m·K) is reached for the composition under consideration at 770 K.

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Authors and Affiliations

  1. Nikolayev Institute of Inorganic Chemistry SB RAS, Novosibirsk, Russia

    V. V. Bakovets & A. V. Sotnikov

  2. Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia

    A. Sh. Agazhanov & S. V. Stankus

Authors
  1. V. V. Bakovets
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  2. A. V. Sotnikov
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  3. A. Sh. Agazhanov
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  4. S. V. Stankus
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Correspondence to A. V. Sotnikov.

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The work was carried out within the framework of the state task of the NIIC SB RAS in the field of basic scientific research.

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Bakovets, V.V., Sotnikov, A.V., Agazhanov, A.S. et al. Real structure and thermal properties of solid solutions of γ-GdxDy1−xS1.5−y. Thermophys. Aeromech. 27, 439–448 (2020). https://doi.org/10.1134/S0869864320030129

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  • DOI: https://doi.org/10.1134/S0869864320030129

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