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High-temperature thermodynamic properties of Y-doped barium zirconates, BaZr1–xYxO3−x/2 (x = 0.1, 0.2), with perovskite-type structure.

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Title: High-temperature thermodynamic properties of Y-doped barium zirconates, BaZr1–xYxO3−x/2 (x = 0.1, 0.2), with perovskite-type structure.
Authors: Tsvetkov, Dmitry S.1 (AUTHOR) Dmitry.Tsvetkov@urfu.ru, Malyshkin, Dmitry A.1 (AUTHOR), Sereda, Vladimir V.1 (AUTHOR), Ivanov, Ivan L.1 (AUTHOR), Tsvetkova, Nadezhda S.1 (AUTHOR), Zuev, Andrey Yu.1 (AUTHOR)
Source: Physics & Chemistry of Minerals. Mar2025, Vol. 52 Issue 1, p1-8. 8p.
Subjects: Thermodynamics, Solid oxide fuel cells, Heat capacity, Thermal expansion, Barium zirconate, Thermodynamic functions
Abstract: Perovskite-type oxides BaZr1–xYxO3−x/2 (x = 0.1, 0.2) were synthesized and their enthalpy increments were measured by means of high-temperature drop calorimetry in the temperature range of (373–1273) K in air. The data obtained were used for estimating the high-temperature thermodynamic functions (constant pressure heat capacity and entropy increments) of the zirconates BaZr1–xYxO3−x/2 (x = 0.1, 0.2). They were found to be only weakly dependent on the concentration of Y-dopant. Thermal expansion coefficient of zirconates BaZr1–xYxO3−x/2 (x = 0.1, 0.2) was successfully estimated by Grüneisen equation. Also, Neumann-Kopp rule was shown to be inapplicable for accurate estimation of heat capacities of the studied oxides. Thermodynamic analysis showed that BaZr1–xYxO3−x/2 (x = 0.1, 0.2) oxides are prone to chemical interaction with CO2 at typical working temperatures of proton-conducting solid oxide fuel cells. Some possibilities to overcome this issue have been discussed. [ABSTRACT FROM AUTHOR]
Copyright of Physics & Chemistry of Minerals is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: High-temperature thermodynamic properties of Y-doped barium zirconates, BaZr<subscript>1–x</subscript>Y<subscript>x</subscript>O<subscript>3−x/2</subscript> (x = 0.1, 0.2), with perovskite-type structure.
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  Data: <searchLink fieldCode="JN" term="%22Physics+%26+Chemistry+of+Minerals%22">Physics & Chemistry of Minerals</searchLink>. Mar2025, Vol. 52 Issue 1, p1-8. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Thermodynamics%22">Thermodynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Solid+oxide+fuel+cells%22">Solid oxide fuel cells</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+capacity%22">Heat capacity</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+expansion%22">Thermal expansion</searchLink><br /><searchLink fieldCode="DE" term="%22Barium+zirconate%22">Barium zirconate</searchLink><br /><searchLink fieldCode="DE" term="%22Thermodynamic+functions%22">Thermodynamic functions</searchLink>
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  Data: Perovskite-type oxides BaZr1–xYxO3−x/2 (x = 0.1, 0.2) were synthesized and their enthalpy increments were measured by means of high-temperature drop calorimetry in the temperature range of (373–1273) K in air. The data obtained were used for estimating the high-temperature thermodynamic functions (constant pressure heat capacity and entropy increments) of the zirconates BaZr1–xYxO3−x/2 (x = 0.1, 0.2). They were found to be only weakly dependent on the concentration of Y-dopant. Thermal expansion coefficient of zirconates BaZr1–xYxO3−x/2 (x = 0.1, 0.2) was successfully estimated by Grüneisen equation. Also, Neumann-Kopp rule was shown to be inapplicable for accurate estimation of heat capacities of the studied oxides. Thermodynamic analysis showed that BaZr1–xYxO3−x/2 (x = 0.1, 0.2) oxides are prone to chemical interaction with CO2 at typical working temperatures of proton-conducting solid oxide fuel cells. Some possibilities to overcome this issue have been discussed. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Physics & Chemistry of Minerals is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s00269-024-01304-6
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      – Code: eng
        Text: English
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      – SubjectFull: Thermodynamics
        Type: general
      – SubjectFull: Solid oxide fuel cells
        Type: general
      – SubjectFull: Heat capacity
        Type: general
      – SubjectFull: Thermal expansion
        Type: general
      – SubjectFull: Barium zirconate
        Type: general
      – SubjectFull: Thermodynamic functions
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    Titles:
      – TitleFull: High-temperature thermodynamic properties of Y-doped barium zirconates, BaZr1–xYxO3−x/2 (x = 0.1, 0.2), with perovskite-type structure.
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            NameFull: Tsvetkov, Dmitry S.
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              M: 03
              Text: Mar2025
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              Y: 2025
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