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Thermal Stability and Electrical Properties of High-Pressure-Molded Nanocomposites Containing Fast Ion-Conductive δ-Bi 2 O 3 Phase.

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Title: Thermal Stability and Electrical Properties of High-Pressure-Molded Nanocomposites Containing Fast Ion-Conductive δ-Bi 2 O 3 Phase.
Authors: Szpakiewicz-Szatan, Aleksander1 (AUTHOR), Garbarczyk, Jerzy E.2 (AUTHOR), Rzoska, Sylwester J.1 (AUTHOR) tomasz.pietrzak@pw.edu.pl, Pietrzak, Tomasz K.2 (AUTHOR), Mizeracki, Jan1 (AUTHOR)
Source: Nanomaterials (2079-4991). Jun2026, Vol. 16 Issue 12, p753. 11p.
Subjects: Ionic conductivity, Bismuth trioxide, Thermal stability, Electrochemical apparatus, Nanocomposite materials, Electric properties, High pressure (Technology)
Abstract: The report presents the electrical, structural, and microstructural properties of high-pressure–high-temperature-treated (HPHT) composites composed of δ-like Bi2O3 nanograins embedded in an aluminosilicate glassy matrix. Nanocomposites were obtained by heat treatment of the Bi2O3-Al2O3-SiO2 ternary glass system, followed by high-pressure molding (above 750 MPa). The total oxygen conductivity σt of the studied nanocomposites was high and approached a value of 4.5 × 10−4 S/cm at 600 °C. Due to HPHT treatment, we could also determine the intragrain conductivity of δ-Bi2O3 nanocrystallites. In this case, the value of σδ was even higher and was equal to 1.3 × 10−3 S/cm at 600 °C. It was also possible to study the temperature dependence of intragrain conductivity, showing two activation energies, which probably reflect the order–disorder transition within the sublattice of mobile O2− ions. The obtained nanocomposites exhibited promising properties for applications in electrochemical devices operating in the intermediate temperature range from 300 to 600 °C. [ABSTRACT FROM AUTHOR]
Copyright of Nanomaterials (2079-4991) is the property of MDPI 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: Thermal Stability and Electrical Properties of High-Pressure-Molded Nanocomposites Containing Fast Ion-Conductive δ-Bi 2 O 3 Phase.
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  Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Jun2026, Vol. 16 Issue 12, p753. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Ionic+conductivity%22">Ionic conductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Bismuth+trioxide%22">Bismuth trioxide</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+stability%22">Thermal stability</searchLink><br /><searchLink fieldCode="DE" term="%22Electrochemical+apparatus%22">Electrochemical apparatus</searchLink><br /><searchLink fieldCode="DE" term="%22Nanocomposite+materials%22">Nanocomposite materials</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+properties%22">Electric properties</searchLink><br /><searchLink fieldCode="DE" term="%22High+pressure+%28Technology%29%22">High pressure (Technology)</searchLink>
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  Data: The report presents the electrical, structural, and microstructural properties of high-pressure–high-temperature-treated (HPHT) composites composed of δ-like Bi2O3 nanograins embedded in an aluminosilicate glassy matrix. Nanocomposites were obtained by heat treatment of the Bi2O3-Al2O3-SiO2 ternary glass system, followed by high-pressure molding (above 750 MPa). The total oxygen conductivity σt of the studied nanocomposites was high and approached a value of 4.5 × 10−4 S/cm at 600 °C. Due to HPHT treatment, we could also determine the intragrain conductivity of δ-Bi2O3 nanocrystallites. In this case, the value of σδ was even higher and was equal to 1.3 × 10−3 S/cm at 600 °C. It was also possible to study the temperature dependence of intragrain conductivity, showing two activation energies, which probably reflect the order–disorder transition within the sublattice of mobile O2− ions. The obtained nanocomposites exhibited promising properties for applications in electrochemical devices operating in the intermediate temperature range from 300 to 600 °C. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI 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: 10.3390/nano16120753
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        Text: English
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      – SubjectFull: Ionic conductivity
        Type: general
      – SubjectFull: Bismuth trioxide
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      – SubjectFull: Thermal stability
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      – SubjectFull: Nanocomposite materials
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      – SubjectFull: Electric properties
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      – SubjectFull: High pressure (Technology)
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      – TitleFull: Thermal Stability and Electrical Properties of High-Pressure-Molded Nanocomposites Containing Fast Ion-Conductive δ-Bi 2 O 3 Phase.
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            NameFull: Szpakiewicz-Szatan, Aleksander
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              Text: Jun2026
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